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#4722413 - 04/10/18 06:55 AM Extended OCI : "Just Say No" - If You Drive GDI
ChrisD46 Offline


Registered: 09/10/10
Posts: 1929
Loc: GA.
2017 Hyundai Sonata 2.4L GDI engine in signature calls for OCI of 3,750 (severe) and 7,500 (highway) with 5W20 , 5W30 or 10W30 allowed (depending on ambient temperatures) . *Thinking about doing a 10,000 mile OCIon a GDI engine - I say think again : The first reason is the fuel dilution issue of GDI engines as by 3,000 ~ 4,000 miles after an oil change - it becomes a significant consideration . The 2nd reason is due to the increased impurities a GDI engine creates which ends up back in the oil which I believe find themselves in the vapors that land on intake valves and create carbon deposits which are difficult to clean . Additionally , I'm not sure even a Blackstone test with TBN measurements tells you all you need to know IF you drive a GDI engine - the fuel dilution number may be the most critical . So , I say if you drive a GDI engine - only use synthetic in the recommended rating , with the lowest NOACK and error towards reducing your OCI's rather than extending them ... Your thoughts ?
_________________________
2017 Hyundai Sonata 2.4L GDI 4 cylinder
2010 Hyundai Elantra 2.0L 4 cylinder
2007 Kia Sedona 3.8L 6 cylinder

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#4722416 - 04/10/18 06:59 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: ChrisD46]
Kamele0N Offline


Registered: 02/09/15
Posts: 2095
Loc: Slovenia EU
All that above...plus additionally dont use oily CAFE water...but Sae40 oils...
_________________________
2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD Shell Rimula R6M 10w40

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#4722431 - 04/10/18 07:21 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: ChrisD46]
Greggy_D Offline


Registered: 03/03/05
Posts: 1687
Loc: Michigan
I just did 10,000 miles on an Ecoboost with MC 5w-20. The oil life monitor was down to 2%.

I think the engineers know what they are doing.
_________________________
Greggy D.


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#4722445 - 04/10/18 07:41 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: ChrisD46]
gregk24 Offline


Registered: 04/13/13
Posts: 5627
Loc: FL, USA
I think it depends on the car manufacturer. Hyundai GDI's seem to tear up oil in short order. I have seen UOA on VW direct injected and turbo'd engines running to 10K and great results. Same goes for Ford and their EcoBoost line.
_________________________
2012 Honda Accord EX-L K24z3
53,xxx miles
PPPP 0w20 / Fram Ultra

2014 VW Jetta SE 1.8T ea888
37,xxx miles
Castrol Edge 0w40 / OEM filter

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#4722447 - 04/10/18 07:42 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: ChrisD46]
Speak2Mountain Offline


Registered: 04/07/17
Posts: 351
Loc: Mississippi
I do about 6k on an early adopter GDI, Lexus IS

My routine:

1) Lotsa highway miles and high speeds
2) Lower NOACK, heavier oils. Heavy 5w30 or lighter 5w40
3) Fuel additives w/PEA and TT fuels
4) Change out Positive Crankcase Ventilation valve
5) Limit stop and go

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#4722468 - 04/10/18 07:57 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: Greggy_D]
Trav Offline


Registered: 11/20/06
Posts: 19311
Loc: MA, Mittelfranken.de
Originally Posted By: Greggy_D
I just did 10,000 miles on an Ecoboost with MC 5w-20. The oil life monitor was down to 2%.

I hope the engineers know what they are doing.


Fixed it. They probably do but unfortunately they are not the only ones involved in making that decision.
_________________________
ASE L1, Master. Deutsch Meisterbrief.

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#4722472 - 04/10/18 08:02 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: ChrisD46]
SilverSnake Offline


Registered: 05/29/13
Posts: 613
Loc: Florida
Originally Posted By: ChrisD46
2017 Hyundai Sonata 2.4L GDI engine in signature calls for OCI of 3,750 (severe) and 7,500 (highway) with 5W20 , 5W30 or 10W30 allowed (depending on ambient temperatures) . *Thinking about doing a 10,000 mile OCIon a GDI engine - I say think again : The first reason is the fuel dilution issue of GDI engines as by 3,000 ~ 4,000 miles after an oil change - it becomes a significant consideration . The 2nd reason is due to the increased impurities a GDI engine creates which ends up back in the oil which I believe find themselves in the vapors that land on intake valves and create carbon deposits which are difficult to clean . Additionally , I'm not sure even a Blackstone test with TBN measurements tells you all you need to know IF you drive a GDI engine - the fuel dilution number may be the most critical . So , I say if you drive a GDI engine - only use synthetic in the recommended rating , with the lowest NOACK and error towards reducing your OCI's rather than extending them ... Your thoughts ?


I am with you. I change the oil on our BMW 330i every 6 months or 5000 miles, whichever comes first.
_________________________
2016 Charger, 6.4L-485 HP (PUP 0W-40)
2017 BMW 330i, 2L-248 HP (BMW 0W-20)
2018 Jeep GC, 5.7L-360 HP (PUP 5W-20)
2008 20KW Generac (Amsoil 10W-30/30)

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#4722474 - 04/10/18 08:08 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: ChrisD46]
doitmyself Offline


Registered: 06/03/02
Posts: 6274
Loc: MI
Is the main purpose of GDI to increase fuel efficiency? If so, I wonder how the numbers work out regarding the cost of more frequent oil changes vs. better fuel economy. Not just in our pocketbook, but also in the amount of total resources consumed.

Having said that, are the supposed GDI problems real? I thought things have been improved.

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#4722480 - 04/10/18 08:13 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: Trav]
Danno Offline


Registered: 10/07/12
Posts: 2023
Loc: Northern Ontario, Canada
Originally Posted By: Trav
Originally Posted By: Greggy_D
I just did 10,000 miles on an Ecoboost with MC 5w-20. The oil life monitor was down to 2%.

I hope the engineers know what they are doing.


Fixed it. They probably do but unfortunately they are not the only ones involved in making that decision.


All that Ford wants is that the truck is perceived as having a low maintenance requirement and that makes it past warranty without a major failure.
Past warranty - They Don't Care ......
Having run 1,000s of Fords in a fleet, this comes from 1st hand experience.

If it was my truck and I wanted to keep it past warranty, I would change it at 5,000 mile and use a 5W-30 D1G2 synthetic oil.
That OCI might reduce my concerns re: the history on the cam chain problems for the 3.5L EB
_________________________
2016 Sorento SX V6 AWD
2015 KIA RIO SX
2010 Mazda 3 2.0L
2009 Venza V6 AWD
2013 Sonata 2.4L RIP in write-off crash

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#4722483 - 04/10/18 08:19 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: ChrisD46]
turnbowm Online   content


Registered: 05/14/15
Posts: 187
Loc: So. Calif.
Fuel dilution in Hyundai/Kia GDI engines is a good reason to choose 5W30 or 10W30 over 5W20. Also, a synthetic with low volatility (NOACK) to minimize carbon buildup on intake valves is why some people use 10W30 instead of 5W30. I use "normal" operating conditions for required (7,500mi/1yr) OCI on my Kia 2.4L GDI using PUP 5W30 and OEM oil filter. Will probably switch to PUP 10W30 next oil change.
_________________________
2015 Kia Optima EX 2.4L GDI
2015 Chevy Volt

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#4722492 - 04/10/18 08:26 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: ChrisD46]
JHZR2 Offline



Registered: 12/14/02
Posts: 41896
Loc: New Jersey
OP, do you have a UOA for YOUR driving profile and YOUR engine to substantiate the fuel dilution claims?

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#4722494 - 04/10/18 08:28 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: Trav]
Greggy_D Offline


Registered: 03/03/05
Posts: 1687
Loc: Michigan
Originally Posted By: Trav
Originally Posted By: Greggy_D
I just did 10,000 miles on an Ecoboost with MC 5w-20. The oil life monitor was down to 2%.

I hope the engineers know what they are doing.


Fixed it. They probably do but unfortunately they are not the only ones involved in making that decision.


Please do not change the words in my quote. That is not what I said.
_________________________
Greggy D.


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#4722503 - 04/10/18 08:42 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: Danno]
camrydriver111 Offline


Registered: 07/01/14
Posts: 1501
Loc: Canada
Originally Posted By: Danno
Originally Posted By: Trav
Originally Posted By: Greggy_D
I just did 10,000 miles on an Ecoboost with MC 5w-20. The oil life monitor was down to 2%.

I hope the engineers know what they are doing.


Fixed it. They probably do but unfortunately they are not the only ones involved in making that decision.


All that Ford wants is that the truck is perceived as having a low maintenance requirement and that makes it past warranty without a major failure.
Past warranty - They Don't Care ......


I don't think that is the case, especially considering they initially lost business to the Japanese due to reliability...

Yes, I'm sure they care less once it's out of warranty but it's not in Ford's best interest for the engine to fail right after warranty either.
_________________________
BITOG or: How I Learned to Stop Worrying and Love the Extended OCI

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#4722504 - 04/10/18 08:43 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: ChrisD46]
theeagleflies Offline


Registered: 01/06/17
Posts: 38
Loc: CT USA
right now, working with 5k mi, 6 month OCI; OLM in the teens.... below 20%. so far 18.2k miles on the car.
Also have an E2 catch can installed that grabs about an ounce every 1k mi.
i noticed upon emptying the 10 qts of oil into the oil pan; the whole garage stinks. seemingly much more so than with past port injected cars with 7.5k mi OCI.
not very scientific; but something is different.
mulling over doing 4k mi OCI since my driving has increased a little; 3 changes per year.... oil is cheap enough.
for me, cost has never been a consideration for oil changes, more of a what makes sense for me and my schedule than anything else.

i am also thinking that without a lab full of organic and inorganic analytical instrumentation it is not possible to really know everything about the oil.
_________________________
2016 2SS Camaro SS; M6, NPP, MRC
Elite E2, Edge Ti 5w30

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#4722531 - 04/10/18 09:11 AM Re: Extended OCI : "Just Say No" - If You Drive GDI [Re: ChrisD46]
wemay Offline


Registered: 04/04/12
Posts: 8998
Loc: Southeast Florida
I've never gone past 5K miles on any vehicle, Port or Direct Injected.

Depending on specs recommended in the Owner's Manual, i've used Conventional, Blends and Synthetics with no issue.
_________________________
17 Sonata Sport 2.4L
NAPA Full Synthetic 5w20 | OEM

13 Santa Fe Sport 2.0T
Valvoline MaxLife 5w30 | M1-104

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