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Oil type, no big difference | GDI carbon #4774543
06/01/18 03:00 PM
06/01/18 03:00 PM
Joined: Apr 2012
Posts: 10,819
Kendall, FL
wemay Offline OP
wemay  Offline OP

Joined: Apr 2012
Posts: 10,819
Kendall, FL
2.4L / 2.0T / 1.6T

From what I've seen after visiting a few (mostly Santa fe Sport [2013-present] and Sonata [2011-present] forums over the past few weeks, oil type does not matter. Noack %, Synthetic vs Conventional, OCI, catch cans, fuel octane, driving style, ambient temps, nice looking UOA... nothing makes a definitive difference. Some folks using full synthetic get deposits early and some using Conventional haven't had any issues yet, and vice versa. Most of these are around 50-80K miles (this is typically when symptoms begin to show, like hard starts, knocking, pinging, vibration under acceleration and stumbling at low RPM). But nailing down who gets it based on oil used seems fruitless since dino, blend and syns get it, and dino, blends and syns....don't.

Now to be clear, most on those boards have not had any carbon issue regardless of the paranoia they exhibit. I am referencing those who have posted that they have, which is a decent amount of folks.


2018 KIA Sportage 2.4 AWD:
Carquest Full Syn 5W-20, Carquest Prem 85334

2013 Hyundai Santa Fe Sport 2.0T:
Quaker State Ultimate Durability 5W-30, OEM


Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774547
06/01/18 03:05 PM
06/01/18 03:05 PM
Joined: Feb 2013
Posts: 11,514
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline

Joined: Feb 2013
Posts: 11,514
Phoenix, AZ
Everyone talks about carbon deposits with GDI, but how do they know how much this happens? Where can you see this? Sounds like a lot of speculation from people who haven't torn their engine apart to check whether it even happens or not.


2015 Hyundai Sonata 2.4L 97k STP Synthetic HM 10w30 & Wix
2000 Toyota Camry 2.2L 234k Mobil Super HM 10w40 & Fram Ultra
1996 Jeep Cherokee 4.0L 149k Mobil 1 HM 10w40 & Fram Ultra
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774548
06/01/18 03:05 PM
06/01/18 03:05 PM
Joined: Apr 2016
Posts: 2,044
Oregon
1JZ_E46 Offline
1JZ_E46  Offline

Joined: Apr 2016
Posts: 2,044
Oregon
I wouldn't be surprised if that were the case. I would think the biggest driver of carbon build-up is how much oil mist/vapor is actually passing through the PCV system from blow-by.


2019 Tesla Model 3 SR+
2016 Countryman S: Castrol 0W-40
Re: Oil type, no big difference | GDI carbon [Re: Nick1994] #4774550
06/01/18 03:07 PM
06/01/18 03:07 PM
Joined: Apr 2016
Posts: 2,044
Oregon
1JZ_E46 Offline
1JZ_E46  Offline

Joined: Apr 2016
Posts: 2,044
Oregon
Originally Posted By: Nick1994
Everyone talks about carbon deposits with GDI, but how do they know how much this happens? Where can you see this? Sounds like a lot of speculation from people who haven't torn their engine apart to check whether it even happens or not.


It happens a lot. Every single DI BMW engine I have seen has serious carbon build-up in the intake ports and on the valves.


2019 Tesla Model 3 SR+
2016 Countryman S: Castrol 0W-40
Re: Oil type, no big difference | GDI carbon [Re: 1JZ_E46] #4774555
06/01/18 03:10 PM
06/01/18 03:10 PM
Joined: Oct 2014
Posts: 13,804
Canyon County Idaho
CT8 Offline
CT8  Offline

Joined: Oct 2014
Posts: 13,804
Canyon County Idaho
Originally Posted By: 1JZ_E46
Originally Posted By: Nick1994
Everyone talks about carbon deposits with GDI, but how do they know how much this happens? Where can you see this? Sounds like a lot of speculation from people who haven't torn their engine apart to check whether it even happens or not.


It happens a lot. Every single DI BMW engine I have seen has serious carbon build-up in the intake ports and on the valves.
BMW had carbon issues when they had port fuel injection in the early years.


2015 F150 2.7
2018 F350 6.2
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774556
06/01/18 03:13 PM
06/01/18 03:13 PM
Joined: Sep 2014
Posts: 2,238
US-WA
Dyusik Offline
Dyusik  Offline

Joined: Sep 2014
Posts: 2,238
US-WA
My model/year car is plagued with deposit issues. The TSB work I have seen done on majority of the cars read about was around 35k. On mine, they couldn't replicate until 73k, and even then I wasn't having any consistent trouble with it. The offered and I told them sure. So new rings went in and whatever else. I am a believer in low NOACK for DI deposit, but then the ring tension was so low in the IS's that the PCV would shoot a stream of oil into the intake. Beat on the car for a little while, and you need to top off the oil.
TSB or anything else has not been able to replace the cleaning power of gasoline though, still have to clean the carbon off. Just depends how often.


95 Cherokee 190K DELO 10W30, XG8
07 IS250 110K Frankenbrew, WIX 57173
04 YZF-R1 19K DELO 15w40, XG7317
14 RX450h 41k Idemitsu 0w20, WIX 57047
18 RAM 3500 503 FF, Mopar
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774559
06/01/18 03:17 PM
06/01/18 03:17 PM
Joined: Dec 2017
Posts: 663
Indy
69Torino Offline
69Torino  Offline

Joined: Dec 2017
Posts: 663
Indy
It happens on every single Kia and Hyundai GDI car. Every single one over 30k Miles I’ve had apart has had junk on the intake valves. MPI engines USUALLY don’t. I’ve had hundreds of Kia intakes off over the last 5 years. I’ve seen some MPI cars with a quarter million miles with spotless intake valves. GDI is a joke.


1969 Ford Torino GT 390 Auto
2003 Mercury Marauder
1992 Mercury Capri Convertible
2005 Ford Freestyle
2008 Hyundai Santa Fe
1947 Ford 2N
1978 Honda XL75
Plus Other Stuff...
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774570
06/01/18 03:27 PM
06/01/18 03:27 PM
Joined: Feb 2013
Posts: 3,564
Central Virginia
Silverado12 Online content
Silverado12  Online Content

Joined: Feb 2013
Posts: 3,564
Central Virginia
Kia/Hyundai is bottom of the line anyways so I would expect problems. I would move towards something known for better reliability if you don't have mechanical skills to fix your issues.


12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
Re: Oil type, no big difference | GDI carbon [Re: Silverado12] #4774576
06/01/18 03:34 PM
06/01/18 03:34 PM
Joined: Apr 2012
Posts: 10,819
Kendall, FL
wemay Offline OP
wemay  Offline OP

Joined: Apr 2012
Posts: 10,819
Kendall, FL
Originally Posted By: Silverado12
Kia/Hyundai is bottom of the line anyways so I would expect problems. I would move towards something known for better reliability if you don't have mechanical skills to fix your issues.


LOL crackmeup
Here we go again. Clearly not up with the times.


2018 KIA Sportage 2.4 AWD:
Carquest Full Syn 5W-20, Carquest Prem 85334

2013 Hyundai Santa Fe Sport 2.0T:
Quaker State Ultimate Durability 5W-30, OEM


Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774586
06/01/18 03:40 PM
06/01/18 03:40 PM
Joined: Jun 2017
Posts: 864
ZFW
JustN89 Online content
JustN89  Online Content

Joined: Jun 2017
Posts: 864
ZFW
trolling

Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774589
06/01/18 03:42 PM
06/01/18 03:42 PM
Joined: Dec 2014
Posts: 1,494
California
Vuflanovsky Offline
Vuflanovsky  Offline

Joined: Dec 2014
Posts: 1,494
California
Hah!! Knee jerk invitation for Hyundai/Kia bashing just waiting for the next next opportunity.

My question would be if I have an over 5 year old Hyundai DI car with no apparent DI-related issues and 80K miles ( as I do ) does that make it a joke...or does the joke center around getting 120K-150K miles ( how long I typically keep a car ) with none of these issues?? Does that make it an anomaly at that point??

I know too many people with DI cars and heavy miles to take this incessant B.S. seriously as a blanket statement.

Personally, I'm waiting for the 2019 Excel to come out because it's supposed to have side draft carbs.

Re: Oil type, no big difference | GDI carbon [Re: Nick1994] #4774596
06/01/18 03:47 PM
06/01/18 03:47 PM
Joined: Jul 2005
Posts: 32,308
NY
demarpaint Offline
demarpaint  Offline

Joined: Jul 2005
Posts: 32,308
NY
Originally Posted By: Nick1994
Everyone talks about carbon deposits with GDI, but how do they know how much this happens? Where can you see this? Sounds like a lot of speculation from people who haven't torn their engine apart to check whether it even happens or not.


The best people to ask are the techs servicing them at the dealerships. One or two people's personal experiences don't mean much.


God Bless Our Troops

Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774597
06/01/18 03:50 PM
06/01/18 03:50 PM
Joined: Mar 2017
Posts: 9,668
...
PimTac Offline
PimTac  Offline

Joined: Mar 2017
Posts: 9,668
...
I have to believe that driving patterns and possibly fuel choice matter here. A typical GDI vehicle that sees 80% of its trips less than a few miles running on cheap generic 87 octane gasoline would seem to me one of those mentioned with buildup at 30k. There are a lot of these situations out there. Many drivers who own a GDI don’t even know what it means.


2017 Mazda CX5
Havoline Pro DS 0w20
Roki OEM filter.
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774600
06/01/18 03:53 PM
06/01/18 03:53 PM
Joined: Dec 2014
Posts: 1,494
California
Vuflanovsky Offline
Vuflanovsky  Offline

Joined: Dec 2014
Posts: 1,494
California
Empirical data would be the best "person" to ask and not techs at the dealership....

Re: Oil type, no big difference | GDI carbon [Re: Vuflanovsky] #4774605
06/01/18 03:59 PM
06/01/18 03:59 PM
Joined: Apr 2012
Posts: 10,819
Kendall, FL
wemay Offline OP
wemay  Offline OP

Joined: Apr 2012
Posts: 10,819
Kendall, FL
Originally Posted By: Vuflanovsky
Hah!! Knee jerk invitation for Hyundai/Kia bashing just waiting for the next next opportunity.

My question would be if I have an over 5 year old Hyundai DI car with no apparent DI-related issues and 80K miles ( as I do ) does that make it a joke...or does the joke center around getting 120K-150K miles ( how long I typically keep a car ) with none of these issues?? Does that make it an anomaly at that point??

I know too many people with DI cars and heavy miles to take this incessant B.S. seriously as a blanket statement.

Personally, I'm waiting for the 2019 Excel to come out because it's supposed to have side draft carbs.


As do I. The 2.0T in my sig...100K miles, no drivabilty issues or anything else to speak of. It's been the most reliable vehicle I've ever owned or leased. Yes, anecdotal.


2018 KIA Sportage 2.4 AWD:
Carquest Full Syn 5W-20, Carquest Prem 85334

2013 Hyundai Santa Fe Sport 2.0T:
Quaker State Ultimate Durability 5W-30, OEM


Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774613
06/01/18 04:13 PM
06/01/18 04:13 PM
Joined: Aug 2016
Posts: 443
Alberta
carviewsonic Offline
carviewsonic  Offline

Joined: Aug 2016
Posts: 443
Alberta
I installed a catch can on our new Impala 3.6 DI (will post photos this weekend) as a bit of insurance against intake valve deposits. Whether or not it is needed, who knows for sure. I believe it should help prevent oil from getting to the intake. It wasn't hard to install, and can be removed easily if warranty is a concern. I like tinkering, so I didn't mind installing it.

Last edited by carviewsonic; 06/01/18 04:13 PM.

'18 Impala
'05 Park Avenue
'07 Honda Accord
'09 VStar 1300
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774632
06/01/18 04:28 PM
06/01/18 04:28 PM
Joined: Dec 2014
Posts: 1,494
California
Vuflanovsky Offline
Vuflanovsky  Offline

Joined: Dec 2014
Posts: 1,494
California
Originally Posted By: wemay
Originally Posted By: Vuflanovsky
Hah!! Knee jerk invitation for Hyundai/Kia bashing just waiting for the next next opportunity.

My question would be if I have an over 5 year old Hyundai DI car with no apparent DI-related issues and 80K miles ( as I do ) does that make it a joke...or does the joke center around getting 120K-150K miles ( how long I typically keep a car ) with none of these issues?? Does that make it an anomaly at that point??

I know too many people with DI cars and heavy miles to take this incessant B.S. seriously as a blanket statement.

Personally, I'm waiting for the 2019 Excel to come out because it's supposed to have side draft carbs.


As do I. The 2.0T in my sig...100K miles, no drivabilty issues or anything else to speak of. It's been the most reliable vehicle I've ever owned or leased. Yes, anecdotal.


Yep. At a certain point, the empirical and the anecdotal come together...and my guess is that blanket statements about DI, carbon deposits, and what to expect and when, don't pass the smell test for people who take care of their cars or might have designs that are more or less prone to coking, etc.

Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774669
06/01/18 05:05 PM
06/01/18 05:05 PM
Joined: Apr 2012
Posts: 10,819
Kendall, FL
wemay Offline OP
wemay  Offline OP

Joined: Apr 2012
Posts: 10,819
Kendall, FL
Cheers2


2018 KIA Sportage 2.4 AWD:
Carquest Full Syn 5W-20, Carquest Prem 85334

2013 Hyundai Santa Fe Sport 2.0T:
Quaker State Ultimate Durability 5W-30, OEM


Re: Oil type, no big difference | GDI carbon [Re: demarpaint] #4774673
06/01/18 05:08 PM
06/01/18 05:08 PM
Joined: Sep 2010
Posts: 9,157
Texas
4WD Offline
4WD  Offline

Joined: Sep 2010
Posts: 9,157
Texas
Originally Posted By: demarpaint
Originally Posted By: Nick1994
Everyone talks about carbon deposits with GDI, but how do they know how much this happens? Where can you see this? Sounds like a lot of speculation from people who haven't torn their engine apart to check whether it even happens or not.


The best people to ask are the techs servicing them at the dealerships. One or two people's personal experiences don't mean much.


Think 69 Torino is a Kia tech …

Re: Oil type, no big difference | GDI carbon [Re: 4WD] #4774691
06/01/18 05:25 PM
06/01/18 05:25 PM
Joined: Jul 2005
Posts: 32,308
NY
demarpaint Offline
demarpaint  Offline

Joined: Jul 2005
Posts: 32,308
NY
Originally Posted By: 4WD
Originally Posted By: demarpaint
Originally Posted By: Nick1994
Everyone talks about carbon deposits with GDI, but how do they know how much this happens? Where can you see this? Sounds like a lot of speculation from people who haven't torn their engine apart to check whether it even happens or not.


The best people to ask are the techs servicing them at the dealerships. One or two people's personal experiences don't mean much.


Think 69 Torino is a Kia tech …


And there you have it! I've spoken to a few myself, it is also brand specific in many cases.


God Bless Our Troops

Re: Oil type, no big difference | GDI carbon [Re: Nick1994] #4774693
06/01/18 05:27 PM
06/01/18 05:27 PM
Joined: Sep 2010
Posts: 2,336
GA.
ChrisD46 Offline
ChrisD46  Offline

Joined: Sep 2010
Posts: 2,336
GA.
Originally Posted By: Nick1994
Everyone talks about carbon deposits with GDI, but how do they know how much this happens? Where can you see this? Sounds like a lot of speculation from people who haven't torn their engine apart to check whether it even happens or not.
*Only way to tell is with a bore scope !


2017 Hyundai Sonata 2.4L GDI 4 cylinder
2010 Hyundai Elantra 2.0L 4 cylinder
2007 Kia Sedona 3.8L 6 cylinder
Re: Oil type, no big difference | GDI carbon [Re: Silverado12] #4774713
06/01/18 05:38 PM
06/01/18 05:38 PM
Joined: Sep 2010
Posts: 2,336
GA.
ChrisD46 Offline
ChrisD46  Offline

Joined: Sep 2010
Posts: 2,336
GA.
Originally Posted By: Silverado12
Kia/Hyundai is bottom of the line anyways so I would expect problems. I would move towards something known for better reliability if you don't have mechanical skills to fix your issues.
*Here is my plan to deal with my bottom of the line Hyundai GDI engine : 1) Use Top Tier Fuel 2 ) Use low NOACK D1 Gen 2 synthetic oil 3)stay with 5K mile OCI's max 4) Use fuel system cleaner before every oil change 5)Use CRC Intake Valve Cleaner every 15K miles 6) Lastly , change spark plugs slightly early ... I have 16K miles on my Sonata GDI engine now ... If I still end up with a carbon build up issue after 40K miles - then I give up (lol !)


2017 Hyundai Sonata 2.4L GDI 4 cylinder
2010 Hyundai Elantra 2.0L 4 cylinder
2007 Kia Sedona 3.8L 6 cylinder
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774796
06/01/18 06:54 PM
06/01/18 06:54 PM
Joined: Oct 2014
Posts: 13,804
Canyon County Idaho
CT8 Offline
CT8  Offline

Joined: Oct 2014
Posts: 13,804
Canyon County Idaho
Compared to NOACk "oil thickening?" The crank case os full of oil mist and blow by products making any evaporation of the oil
in consequential.


2015 F150 2.7
2018 F350 6.2
Re: Oil type, no big difference | GDI carbon [Re: CT8] #4774807
06/01/18 07:01 PM
06/01/18 07:01 PM
Joined: Apr 2016
Posts: 2,044
Oregon
1JZ_E46 Offline
1JZ_E46  Offline

Joined: Apr 2016
Posts: 2,044
Oregon
Originally Posted By: CT8
Compared to NOACk "oil thickening?" The crank case os full of oil mist and blow by products making any evaporation of the oil
in consequential.


Not true. Oil in a gaseous state is far more likely to stick and result in a deposit than in liquid form (mist).


2019 Tesla Model 3 SR+
2016 Countryman S: Castrol 0W-40
Re: Oil type, no big difference | GDI carbon [Re: Silverado12] #4774876
06/01/18 08:19 PM
06/01/18 08:19 PM
Joined: Mar 2010
Posts: 654
NY
mx5miata Offline
mx5miata  Offline

Joined: Mar 2010
Posts: 654
NY
That’s not a fair comment or statement. Hyundai and Kia come a long way in short period of time and make a good vehicle. My first car was a 03 Tiburon GT V6 and was all around a great car same with my fathers 03 Sonata and 07 Santa Fe. Many Direct injection engines are having the carbon issue even the German automakers.


NAPA FULL SYNTHETIC 0w20 Partsplus oil filter
Wix air filter
Re: Oil type, no big difference | GDI carbon [Re: Silverado12] #4774880
06/01/18 08:28 PM
06/01/18 08:28 PM
Joined: May 2010
Posts: 10,179
out there
spasm3 Offline
spasm3  Offline

Joined: May 2010
Posts: 10,179
out there
Originally Posted By: Silverado12
Kia/Hyundai is bottom of the line anyways so I would expect problems. I would move towards something known for better reliability if you don't have mechanical skills to fix your issues.


You are just un/misinformed.


13 elantra 75k 5w30 QSUD
03 chevy avalanche 80k synpwr 5w30
17 mazda cx-5 9500 miles m1 0w30
Re: Oil type, no big difference | GDI carbon [Re: PimTac] #4774917
06/01/18 09:12 PM
06/01/18 09:12 PM
Joined: Mar 2012
Posts: 1,188
WA
Brigadier Offline
Brigadier  Offline

Joined: Mar 2012
Posts: 1,188
WA
Originally Posted By: PimTac
I have to believe that driving patterns and possibly fuel choice matter here. A typical GDI vehicle that sees 80% of its trips less than a few miles running on cheap generic 87 octane gasoline would seem to me one of those mentioned with buildup at 30k. There are a lot of these situations out there. Many drivers who own a GDI don’t even know what it means.


That and lack of timely OCIs or at best, following the OLM which is incorrect.


2017 Hyundai Santa Fe SE, 3.3L, AWD, QSUD 5w30, OEM filter, Hy-per Lube ZRA

https://www.pure-gas.org/ << Wake up your engine!!

Where the stars and stripes and the eagle fly
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774947
06/01/18 09:41 PM
06/01/18 09:41 PM
Joined: Mar 2010
Posts: 654
NY
mx5miata Offline
mx5miata  Offline

Joined: Mar 2010
Posts: 654
NY
Does the length of OCI's really have any affect of the carbon buildup on the intake valves?

or is dilution a concern?

Last edited by mx5miata; 06/01/18 09:42 PM.

NAPA FULL SYNTHETIC 0w20 Partsplus oil filter
Wix air filter
Re: Oil type, no big difference | GDI carbon [Re: mx5miata] #4774970
06/01/18 10:04 PM
06/01/18 10:04 PM
Joined: Mar 2012
Posts: 1,188
WA
Brigadier Offline
Brigadier  Offline

Joined: Mar 2012
Posts: 1,188
WA
Originally Posted By: mx5miata
Does the length of OCI's really have any affect of the carbon buildup on the intake valves?

or is dilution a concern?


My understanding is that fuel dilution leads to a drop in the flash point of the oil, leading to more burn off, leading to more oil vapor passing thru the intake.....


2017 Hyundai Santa Fe SE, 3.3L, AWD, QSUD 5w30, OEM filter, Hy-per Lube ZRA

https://www.pure-gas.org/ << Wake up your engine!!

Where the stars and stripes and the eagle fly
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4774971
06/01/18 10:05 PM
06/01/18 10:05 PM
Joined: Aug 2012
Posts: 493
North Carolina
Urshurak776 Offline
Urshurak776  Offline

Joined: Aug 2012
Posts: 493
North Carolina
My GDI Kia is going on 85K. No issues whatsoever. I will say that I change the oil every 5K and my driving is probably 85% highway. One way to work is 25 highway miles. The other 10 is usually a lot of traffic though. That may be the biggest part of imy success is I get the engine good and hot every day. Other than factory fill and the first oil change (semi-Synthetic) all oil changes have been whatever full synthetic I can get cheap. I use Techron every oil change and usually use top tier fuel. Usually I use 5W-20 in winter and 5W-30 in summer. So I am happy with my “bottom of the line” KIA.

Last edited by Urshurak776; 06/01/18 10:09 PM.

2012 Hyundai Santa Fe, 145,000 miles, Havoline Pro DS Full Syn 10W-30, Champ Labs Filter.
2014 Kia Rio, 85,000 miles, Havoline Pro DS Full Sun 5W-30, WIX Filter.
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4775029
06/01/18 11:15 PM
06/01/18 11:15 PM
Joined: Mar 2012
Posts: 553
Toronto, Canada
HKPolice Offline
HKPolice  Offline

Joined: Mar 2012
Posts: 553
Toronto, Canada
Oil is not the main cause of DI carbon build up, EGR is. The quality of fuel you're using will affect how much soot is in the EGR, it has a much bigger impact than oil choice.

Re: Oil type, no big difference | GDI carbon [Re: Urshurak776] #4775033
06/01/18 11:23 PM
06/01/18 11:23 PM
Joined: Dec 2005
Posts: 945
Ontario Canada
caprice_2nv Offline
caprice_2nv  Offline

Joined: Dec 2005
Posts: 945
Ontario Canada
Originally Posted By: Urshurak776
My GDI Kia is going on 85K. No issues whatsoever. I will say that I change the oil every 5K and my driving is probably 85% highway. One way to work is 25 highway miles. The other 10 is usually a lot of traffic though. That may be the biggest part of imy success is I get the engine good and hot every day. Other than factory fill and the first oil change (semi-Synthetic) all oil changes have been whatever full synthetic I can get cheap. I use Techron every oil change and usually use top tier fuel. Usually I use 5W-20 in winter and 5W-30 in summer. So I am happy with my “bottom of the line” KIA.


I'm curious what does your oil look like at the end of your oil changes? My girlfriend does 3k mile oil changes and her oil is tar black even immediately after an oil change. 60k miles on her 13 Sonata. Smells like gas too


84 Olds Cutlass - 350 Olds
83 Chevy Caprice - 305 Sbc
79 Honda CX500
Re: Oil type, no big difference | GDI carbon [Re: caprice_2nv] #4775101
06/02/18 05:01 AM
06/02/18 05:01 AM
Joined: Mar 2012
Posts: 553
Toronto, Canada
HKPolice Offline
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Toronto, Canada
Originally Posted By: caprice_2nv
Originally Posted By: Urshurak776
My GDI Kia is going on 85K. No issues whatsoever. I will say that I change the oil every 5K and my driving is probably 85% highway. One way to work is 25 highway miles. The other 10 is usually a lot of traffic though. That may be the biggest part of imy success is I get the engine good and hot every day. Other than factory fill and the first oil change (semi-Synthetic) all oil changes have been whatever full synthetic I can get cheap. I use Techron every oil change and usually use top tier fuel. Usually I use 5W-20 in winter and 5W-30 in summer. So I am happy with my “bottom of the line” KIA.


I'm curious what does your oil look like at the end of your oil changes? My girlfriend does 3k mile oil changes and her oil is tar black even immediately after an oil change. 60k miles on her 13 Sonata. Smells like gas too


Almost all modern GDI engines suffer from this, caused by low tension piston rings all in pursuit of MPG gains. It's tar black because of all the soot generated by high combustion temps like in a diesel.

Re: Oil type, no big difference | GDI carbon [Re: wemay] #4775120
06/02/18 06:08 AM
06/02/18 06:08 AM
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OH
08z06 Offline
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OH
i run a qt. of 15-40 rotella in every oil change. treat it like a worn engine.

Re: Oil type, no big difference | GDI carbon [Re: 08z06] #4775129
06/02/18 06:36 AM
06/02/18 06:36 AM
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Posts: 10,819
Kendall, FL
wemay Offline OP
wemay  Offline OP

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Kendall, FL
Originally Posted By: 08z06
i run a qt. of 15-40 rotella in every oil change. treat it like a worn engine.


You run a qt of 15w40 in what?


2018 KIA Sportage 2.4 AWD:
Carquest Full Syn 5W-20, Carquest Prem 85334

2013 Hyundai Santa Fe Sport 2.0T:
Quaker State Ultimate Durability 5W-30, OEM


Re: Oil type, no big difference | GDI carbon [Re: caprice_2nv] #4775242
06/02/18 08:58 AM
06/02/18 08:58 AM
Joined: Aug 2012
Posts: 493
North Carolina
Urshurak776 Offline
Urshurak776  Offline

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North Carolina
Originally Posted By: caprice_2nv
Originally Posted By: Urshurak776
My GDI Kia is going on 85K. No issues whatsoever. I will say that I change the oil every 5K and my driving is probably 85% highway. One way to work is 25 highway miles. The other 10 is usually a lot of traffic though. That may be the biggest part of imy success is I get the engine good and hot every day. Other than factory fill and the first oil change (semi-Synthetic) all oil changes have been whatever full synthetic I can get cheap. I use Techron every oil change and usually use top tier fuel. Usually I use 5W-20 in winter and 5W-30 in summer. So I am happy with my “bottom of the line” KIA.


I'm curious what does your oil look like at the end of your oil changes? My girlfriend does 3k mile oil changes and her oil is tar black even immediately after an oil change. 60k miles on her 13 Sonata. Smells like gas too


I don't think it looks bad at all. The paper towel test looks no worse then the oil from my non GDI Hyundai. My engine seems to be very clean. I cut my oil filters also. No issues. I really think Hyundai/Kia have good GDI engines if maintenance is done properly.


2012 Hyundai Santa Fe, 145,000 miles, Havoline Pro DS Full Syn 10W-30, Champ Labs Filter.
2014 Kia Rio, 85,000 miles, Havoline Pro DS Full Sun 5W-30, WIX Filter.
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4775270
06/02/18 09:33 AM
06/02/18 09:33 AM
Joined: Jan 2006
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Chatham, Ontario, Canada
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Chatham, Ontario, Canada
I have 130 000 km on my 2011 Kia Optima. I installed a catch can in January 2012 and have had no problems to date. I change the oil every 10 000 km using 5W20 in the winter and 5W30 in the summer. Most reliable car I have ever owned. I also have a 2005 Civic.

Re: Oil type, no big difference | GDI carbon [Re: wemay] #4775336
06/02/18 10:46 AM
06/02/18 10:46 AM
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Ontario Canada
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Ontario Canada
My best friend that still works in the oil change bay I used to, says pretty well all the Hyundai's and kia GDI engines he sees have black oil before and usually even after he changes it. Texted me about one the other day that runs full synthetic and was only at about 4500 miles and the oil was black like a diesel before and after the change. They've also seen 2 personally come in with the famous failed rod bearings that the NHTSA safety recall is all about. I'm sure the dealership sees a lot more than an independent garage since most people should have gotten their recall notice by now.

I'm just concerned about whether the black as tar oil is just because of the direct injection or if her engine is going to fail like so many others have.

The freshly changed oil in her car looks much worse than the dirty oil with 5k miles I drained out of my 83 Caprice which is a carbureted engine and probably has some fuel dilution issues of it's own.

Last edited by caprice_2nv; 06/02/18 10:59 AM.

84 Olds Cutlass - 350 Olds
83 Chevy Caprice - 305 Sbc
79 Honda CX500
Re: Oil type, no big difference | GDI carbon [Re: Nick1994] #4775352
06/02/18 10:57 AM
06/02/18 10:57 AM
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NC
Matagonka Offline
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NC
Originally Posted By: Nick1994
Everyone talks about carbon deposits with GDI, but how do they know how much this happens? Where can you see this? Sounds like a lot of speculation from people who haven't torn their engine apart to check whether it even happens or not.


This!

I also got a 2.4 GDI Santa Fe with 110k miles. Engine and transmission perform the same as when I got it. Regular maintenance and you'll be ok.

Last edited by Matagonka; 06/02/18 10:58 AM.

2018 Mazda 3 Touring HB 2.5
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4775448
06/02/18 12:46 PM
06/02/18 12:46 PM
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California
Vuflanovsky Offline
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California
Yeah, but you're unique....just like everybody else smile

Basic knowledge and experience might tell you that you can't make blanket statements about GDI-related issues. Does a Hyundai Gamma II with 80K miles on it have the same basic carbon involvement or susceptibility issues as an Eco Boost with 100K miles...and if neither experience driveability issues or hesitation, mpg loss, etc. in that time, does that mean it's right around the corner?? I'm sure it does on here, but I'd be much more interested in the empirical reality circa 2018 and the individual, well-maintained engines.

Re: Oil type, no big difference | GDI carbon [Re: caprice_2nv] #4775806
06/02/18 08:56 PM
06/02/18 08:56 PM
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Posts: 10,819
Kendall, FL
wemay Offline OP
wemay  Offline OP

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Kendall, FL
Originally Posted By: caprice_2nv
My best friend that still works in the oil change bay I used to, says pretty well all the Hyundai's and kia GDI engines he sees have black oil before and usually even after he changes it. Texted me about one the other day that runs full synthetic and was only at about 4500 miles and the oil was black like a diesel before and after the change. They've also seen 2 personally come in with the famous failed rod bearings that the NHTSA safety recall is all about. I'm sure the dealership sees a lot more than an independent garage since most people should have gotten their recall notice by now.

I'm just concerned about whether the black as tar oil is just because of the direct injection or if her engine is going to fail like so many others have.

The freshly changed oil in her car looks much worse than the dirty oil with 5k miles I drained out of my 83 Caprice which is a carbureted engine and probably has some fuel dilution issues of it's own.


Why is your friend texting you about an oils appearance from his work?

Edit: I see your gf owns one.

Concerning the oils color on my two Hyundai...nothing out of the ordinary when compared to previous, non-GDI I've owned



2018 KIA Sportage 2.4 AWD:
Carquest Full Syn 5W-20, Carquest Prem 85334

2013 Hyundai Santa Fe Sport 2.0T:
Quaker State Ultimate Durability 5W-30, OEM


Re: Oil type, no big difference | GDI carbon [Re: wemay] #4775848
06/02/18 09:48 PM
06/02/18 09:48 PM
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Virginia
bbhero Offline
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Virginia
That's very helpful to hear Wemay. In the other thread some of our members had thoughts about that. I do think it can matter at times. Like when a vehicle is short tripped a whole lot and the oil has a strong smell of gasoline. Versus my car which looks far, far different because of a lot of long trips, seeing operating temps for a long time, and doesn't smell like gasoline much at all. Running pattern does make a big difference in how it looks and smells. If it never ever changed then it would not matter. Or if it changed extremely quickly then it would not mean anything either. Kind of like exercising and blood pressure. Changes do happen. Systolic pressure does increase with exercise normally. A very high amount if increase over and above a normal expected range is not normal or safe. So changes outside of a normal range are concerning. The opposite is true has well. If it drops it is very concerning has well. My step father who had open heart surgery to help with his atrial fibrillation had a systolic pressure of 72 and diastolic pressure of 38. His heart rate was 150s all the way down to the 40s. The AFib was still present and causing him a serious issue. He was rushed across the street into the ER to get IV Cardizem to help get his heart rate back into a normal range and rhythm and IV fluid bolus to help get his pressure back up.


Nissan Altima 3.5 Coupe
Carquest High mileage full synthetic 5w30
CQ blue 84356 Oil filter
"Treat your family like your friends and treat your friends like your family."
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914631
11/04/18 03:29 PM
11/04/18 03:29 PM
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Posts: 945
Ontario Canada
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Ontario Canada
Just drove my girlfriend's 13 Sonata around town today after dropping her off at work, so I could install her winter tires. When you turn the radio and heater fan off there is very noticeable spark knock happening under acceleration (usually every time it upshifts). It has just under 100,000kms so 62k miles on it.

She adds a fuel system additive occasionally because a mechanic where she used to get her oil changes told her about the issues with these engines. I would be willing to bet that most of these cars driving around have spark knock and the driver's don't notice. First of all you would have to know what spark knock is and sounds like and turn off the radio etc to listen for it, second of all most people with these cats don't know or care about maintenance related stuff. I think this is part of why so many of them are grenading now.

That and they should have installed a low oil level sensor. Maybe when they designed it they didn't do enough testing to realize that they are all going to start burning oil eventually.

Since my girlfriend is not a car person and doesn't want to put any extra $ into using better oil in her car, I'm just going to let it play out and see how long before it seizes up on the highway like so many others are.


84 Olds Cutlass - 350 Olds
83 Chevy Caprice - 305 Sbc
79 Honda CX500
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914640
11/04/18 03:37 PM
11/04/18 03:37 PM
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Posts: 25,014
ON, Canada eh?
StevieC Offline
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ON, Canada eh?
In some Chrysler manuals they write in there that minor spark nock is perfectly acceptable. I'm not sure I would be ok with it but just so you know.


'18 Caravan - 36k KM - AMSOIL SS 0w20, Fram Ultra, TC-W3 500:1
'06 Santa Fe - 535k KM (Retired)

There is no such thing as "lifetime" fluids! mad
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914648
11/04/18 03:45 PM
11/04/18 03:45 PM
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...
PimTac Offline
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...
I have always been in the camp of never liking spark knock. It was so prevalent in the 70’s and 80’s especially with Chrysler lean burn motors. The experts said then that light or occasional spark knock meant you were at peak efficiency for fuel economy.

I’ll take a quiet engine any day.


2017 Mazda CX5
Havoline Pro DS 0w20
Roki OEM filter.
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914654
11/04/18 03:50 PM
11/04/18 03:50 PM
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OH
SatinSilver Offline
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OH
I had a fair amount of spark knock in the 05 Matrix which was solved by replacing the intake manifold gasket. So glad I had that taken care of. Whew!

caprice_2nv, I start using some CRC Intake and GDI cleaner right before the next oil change. I'd also monitor oil level weekly since those engines can become a big risk at that mileage. Maybe use or start using Valvoline Maxlife, top tier fuel, etc...

Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914664
11/04/18 04:01 PM
11/04/18 04:01 PM
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Ontario Canada
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Ontario Canada
Well I don't do the oil changes on this one. Since we will likely be needing the recall coverage we want the receipts for all the oil changes. I know they aren't being that picky about it from all the stories I've read, but we're in Canada and they likely could get away with not covering as much here.

Also right after the oil change it was half a qt low (probably they didn't know about the updated oil capacity) but now after 600 miles and 1 month it's above the full. So the fuel dilution is obviously helping to keep the level up. LOL

Last edited by caprice_2nv; 11/04/18 04:02 PM.

84 Olds Cutlass - 350 Olds
83 Chevy Caprice - 305 Sbc
79 Honda CX500
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914668
11/04/18 04:06 PM
11/04/18 04:06 PM
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ON, Canada eh?
StevieC Offline
StevieC  Offline

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ON, Canada eh?
You can also change to a cooler plug that helps a lot I find where fuel choice and proper maintenance doesn't work.


'18 Caravan - 36k KM - AMSOIL SS 0w20, Fram Ultra, TC-W3 500:1
'06 Santa Fe - 535k KM (Retired)

There is no such thing as "lifetime" fluids! mad
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914763
11/04/18 05:21 PM
11/04/18 05:21 PM
Joined: Apr 2012
Posts: 10,819
Kendall, FL
wemay Offline OP
wemay  Offline OP

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Kendall, FL
I had spark knock (slight ping) on a previous 2.4 Sonata GLS. I changed the plugs and battery (battery needed replacing) and in that case, the knock went away. Not sure why but it did happen, thankfully. Hyundai also told me "slight pinging" was normal.

Last edited by wemay; 11/04/18 05:37 PM.

2018 KIA Sportage 2.4 AWD:
Carquest Full Syn 5W-20, Carquest Prem 85334

2013 Hyundai Santa Fe Sport 2.0T:
Quaker State Ultimate Durability 5W-30, OEM


Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914906
11/04/18 07:28 PM
11/04/18 07:28 PM
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Ontario Canada
caprice_2nv Offline
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Ontario Canada
If it was my car I would definitely try the colder plugs and do a decarbon treatment but since it's hers and as I said she's only willing to do the regular scheduled maintenance as that's what she has budgeted for. The spark plugs are a long ways from being due for replacement.

The battery is likely going to be replaced soon after it gets tested at the garage I used to work at. The place she had her oil changes done at said it tested weak and I agree it sounds a little weak sometimes. I can't imagine how that would help a pinging situation other than forcing the ECM to relearn but the battery was recently disconnected long enough for that anyways.

I rarely drive the car so I won't know if that fixes it short term or not.


84 Olds Cutlass - 350 Olds
83 Chevy Caprice - 305 Sbc
79 Honda CX500
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914910
11/04/18 07:32 PM
11/04/18 07:32 PM
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Ontario Canada
caprice_2nv Offline
caprice_2nv  Offline

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Ontario Canada
I'm sure slight pinging is normal for these cars because they are all going to have at least some amount of carbon buildup. That's what you get with direct injection.

But it's definitely going to have an effect on longevity. Check out www.carcomplaints.com if you want to see the amount of reported engine failures and compare it to pretty well any other vehicle.


84 Olds Cutlass - 350 Olds
83 Chevy Caprice - 305 Sbc
79 Honda CX500
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914924
11/04/18 07:44 PM
11/04/18 07:44 PM
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Posts: 25,014
ON, Canada eh?
StevieC Offline
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ON, Canada eh?
What are the long term fuel trims reading? Perhaps it's running too lean because of a faulty sensor.


'18 Caravan - 36k KM - AMSOIL SS 0w20, Fram Ultra, TC-W3 500:1
'06 Santa Fe - 535k KM (Retired)

There is no such thing as "lifetime" fluids! mad
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914932
11/04/18 07:56 PM
11/04/18 07:56 PM
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Ontario Canada
caprice_2nv Offline
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Ontario Canada
It's possible but the most likely cause is carbon buildup. It does 95% city driving/very short trips and never gets full throttle.

I don't have easy access to a scanner. There is no check engine light on and the pinging is only loud enough to notice with the radio and everything off.

The most I'm going to do is suggest she put another bottle of techron or similar fuel additive in it.


84 Olds Cutlass - 350 Olds
83 Chevy Caprice - 305 Sbc
79 Honda CX500
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914978
11/04/18 08:38 PM
11/04/18 08:38 PM
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Posts: 10,819
Kendall, FL
wemay Offline OP
wemay  Offline OP

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Kendall, FL
Sorry to hear. I've had excellent results from our Hyundai (the KIA is my first) vehicles. Our Santa Fe 2.0T is getting close to 150K miles with zero issues while driving 95% city, idles extensively and has two oil changes where VWB was used. Other than the Sonata ping mentioned earlier, no other issues from our previous 3 Hyundai. But i stay on top of the maintenance religiously. Not necessarily syn oil but more so OCI and TT fuel.

I wonder if colder climates are harder on di vehicles.


2018 KIA Sportage 2.4 AWD:
Carquest Full Syn 5W-20, Carquest Prem 85334

2013 Hyundai Santa Fe Sport 2.0T:
Quaker State Ultimate Durability 5W-30, OEM


Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914988
11/04/18 08:48 PM
11/04/18 08:48 PM
Joined: Dec 2005
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Ontario Canada
caprice_2nv Offline
caprice_2nv  Offline

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Ontario Canada
I would definitely say the cold climate is worse on her car. Last winter her oil would be completely black within a week after an oil change. Once the weather warmed up and I also got her to start changing it at 3 or 4 months max instead of waiting for 3k miles then the oil started to just look a bit dirty but not black like it was last winter.

We'll see if it goes black again once the temperature drops despite the 3 month oil change schedule. I wish I could take over the maintenance and put good stuff in it doing it myself here in the driveway but I don't want to be blamed when it fails anyways. I know that I could reduce the chance of it failing.

She doesn't mind if I go crazy on the maintenance on my cars but she also knows we can jump in them and drive 4 hours on the highway in either one and not worry about making it there and back even though the cars are 35 years old.


84 Olds Cutlass - 350 Olds
83 Chevy Caprice - 305 Sbc
79 Honda CX500
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4914999
11/04/18 08:59 PM
11/04/18 08:59 PM
Joined: Apr 2012
Posts: 10,819
Kendall, FL
wemay Offline OP
wemay  Offline OP

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Kendall, FL
Definitely wishing you guys luck with the Sonata.


2018 KIA Sportage 2.4 AWD:
Carquest Full Syn 5W-20, Carquest Prem 85334

2013 Hyundai Santa Fe Sport 2.0T:
Quaker State Ultimate Durability 5W-30, OEM


Re: Oil type, no big difference | GDI carbon [Re: wemay] #4915207
11/05/18 07:27 AM
11/05/18 07:27 AM
Joined: Dec 2005
Posts: 945
Ontario Canada
caprice_2nv Offline
caprice_2nv  Offline

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Ontario Canada
Much appreciated! I wish you luck with yours as well.


84 Olds Cutlass - 350 Olds
83 Chevy Caprice - 305 Sbc
79 Honda CX500
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4915584
11/05/18 01:15 PM
11/05/18 01:15 PM
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WA
Brigadier Offline
Brigadier  Offline

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Posts: 1,188
WA
My 2017 Santa Fe 3.3L V6 is nudging 35k miles. No sign of pinging even with the radio off and windows up/down.

But then again, I run TT 92 Octane fuel, change the oil according to sever service intervals, and I wind it out at least once a week.

One thing I have noticed is the lack of cold start up timing chain rattle on this engine. My 06 Colorado 3.5L I-5 would always rattle for a split second upon cold start up. Same oil in both - syn 5W30.


2017 Hyundai Santa Fe SE, 3.3L, AWD, QSUD 5w30, OEM filter, Hy-per Lube ZRA

https://www.pure-gas.org/ << Wake up your engine!!

Where the stars and stripes and the eagle fly
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4915845
11/05/18 06:22 PM
11/05/18 06:22 PM
Joined: Dec 2005
Posts: 945
Ontario Canada
caprice_2nv Offline
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Ontario Canada
I wanted to wind hers out the other day when I was driving it alone just to see if it blows black smoke because of the carbon buildup but I'm honestly afraid of taking out a rod bearing while I'm driving it or having it fail the day after I drove it and have her think I caused it, so I drove it gently and just listened for the pinging (for science).

I haven't heard of any issues with the v6 versions but the 2.4 and 2.0t are blowing up quite regularly according to the reading I've done. They are even having a huge increase in fires lately which could possibly be due to the amount that are getting engine replacements, and possibly resultant fuel leaks from something left loose after (very high pressure on any direct injection engine).


84 Olds Cutlass - 350 Olds
83 Chevy Caprice - 305 Sbc
79 Honda CX500
Re: Oil type, no big difference | GDI carbon [Re: caprice_2nv] #4916285
11/06/18 08:16 AM
11/06/18 08:16 AM
Joined: Sep 2010
Posts: 2,336
GA.
ChrisD46 Offline
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GA.
*Are you referring to late model Hyundai / Kia 2.0 turbos and 2.4 non - turbo GDI engines ?... I run 5w30 D1 Gen 2 synthetic oils at <5K OCI's , top tier gas , a bottle of techron right before an oil change and lastly every 10K miles I run a 1/2 bottle of CRC intake valve cleaner through the vacuum PCV line going back into the engine ... So far at 20K miles in my '17 Sonata 2.4 non - turbo GDI I have experienced zero issues . My protocol is probably a bit much but so far it has been working for me .
Originally Posted by caprice_2nv
I wanted to wind hers out the other day when I was driving it alone just to see if it blows black smoke because of the carbon buildup but I'm honestly afraid of taking out a rod bearing while I'm driving it or having it fail the day after I drove it and have her think I caused it, so I drove it gently and just listened for the pinging (for science).

I haven't heard of any issues with the v6 versions but the 2.4 and 2.0t are blowing up quite regularly according to the reading I've done. They are even having a huge increase in fires lately which could possibly be due to the amount that are getting engine replacements, and possibly resultant fuel leaks from something left loose after (very high pressure on any direct injection engine).


2017 Hyundai Sonata 2.4L GDI 4 cylinder
2010 Hyundai Elantra 2.0L 4 cylinder
2007 Kia Sedona 3.8L 6 cylinder
Re: Oil type, no big difference | GDI carbon [Re: wemay] #4916309
11/06/18 08:53 AM
11/06/18 08:53 AM
Joined: Apr 2012
Posts: 10,819
Kendall, FL
wemay Offline OP
wemay  Offline OP

Joined: Apr 2012
Posts: 10,819
Kendall, FL
I just reordered a baffled catch can for the KIA. We'll see how much it collects. The one in the (now gone) Sonata 2.4 didn't collect much at all. Maybe this option would be a good idea for the OP's car...stemming the tide somewhat.

Last edited by wemay; 11/06/18 09:11 AM.

2018 KIA Sportage 2.4 AWD:
Carquest Full Syn 5W-20, Carquest Prem 85334

2013 Hyundai Santa Fe Sport 2.0T:
Quaker State Ultimate Durability 5W-30, OEM


Re: Oil type, no big difference | GDI carbon [Re: wemay] #4916321
11/06/18 09:21 AM
11/06/18 09:21 AM
Joined: Apr 2017
Posts: 466
Mississippi
Speak2Mountain Offline
Speak2Mountain  Offline

Joined: Apr 2017
Posts: 466
Mississippi
I have 157K on DI Lexus IS 250. No problems.

Changed out PCV
Used low NOACK oils
Used PEA products
Most miles are highway miles at 70+
Rev hard (bc its a manual and I enjoy that)

Re: Oil type, no big difference | GDI carbon [Re: ChrisD46] #4916345
11/06/18 09:41 AM
11/06/18 09:41 AM
Joined: May 2010
Posts: 79
Central MA
rsalan Offline
rsalan  Offline

Joined: May 2010
Posts: 79
Central MA
Originally Posted by ChrisD46
*Are you referring to late model Hyundai / Kia 2.0 turbos and 2.4 non - turbo GDI engines ?... I run 5w30 D1 Gen 2 synthetic oils at <5K OCI's , top tier gas , a bottle of techron right before an oil change and lastly every 10K miles I run a 1/2 bottle of CRC intake valve cleaner through the vacuum PCV line going back into the engine ... So far at 20K miles in my '17 Sonata 2.4 non - turbo GDI I have experienced zero issues . My protocol is probably a bit much but so far it has been working for me .

This is a good regimen.


Last edited by rsalan; 11/06/18 09:42 AM.

'17 Mustang GT - PUP 5W20 / Puro BOSS
'16 X4 xDrive28i - BMW 0W20 / MANN
'14 Civic LX - PP 0W20 / FTG
'03 Matrix XR AWD - PP 5W30 / FU
'98 Sienna - PP 5W30 / FU
Re: Oil type, no big difference | GDI carbon [Re: caprice_2nv] #4916363
11/06/18 09:58 AM
11/06/18 09:58 AM
Joined: Mar 2012
Posts: 1,188
WA
Brigadier Offline
Brigadier  Offline

Joined: Mar 2012
Posts: 1,188
WA
Originally Posted by caprice_2nv
I wanted to wind hers out the other day when I was driving it alone just to see if it blows black smoke because of the carbon buildup but I'm honestly afraid of taking out a rod bearing while I'm driving it or having it fail the day after I drove it and have her think I caused it, so I drove it gently and just listened for the pinging (for science).

I haven't heard of any issues with the v6 versions but the 2.4 and 2.0t are blowing up quite regularly according to the reading I've done. They are even having a huge increase in fires lately which could possibly be due to the amount that are getting engine replacements, and possibly resultant fuel leaks from something left loose after (very high pressure on any direct injection engine).


The different versions blowing up is due to Korean manufacture vs US manufacture I believe.

Also, from what I have gathered, KIA/Hyundai do a two stage injection during the combustion cycle. One is while the intake valves are still open enough to get some fuel sprayed on the back.

I also read that they don't use a traditional PCV system. They have modified it to reduce gunk sucked back in across the intake valves.


2017 Hyundai Santa Fe SE, 3.3L, AWD, QSUD 5w30, OEM filter, Hy-per Lube ZRA

https://www.pure-gas.org/ << Wake up your engine!!

Where the stars and stripes and the eagle fly
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