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Direct injection, port injection, dual injection.. #4676097
02/24/18 04:58 AM
02/24/18 04:58 AM
Joined: Feb 2016
Posts: 596
GA
miden851 Offline OP
miden851  Offline OP
Joined: Feb 2016
Posts: 596
GA
...and possible problems one to be reckoned with; all explained in plain English!



2008 Mazda6i GT; @208K miles
2016 Honda CR-V EX-L; @36K miles
Re: Direct injection, port injection, dual injection.. [Re: miden851] #4676105
02/24/18 05:26 AM
02/24/18 05:26 AM
Joined: Jul 2005
Posts: 30,966
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,966
NY
Interesting. Thanks for posting.


God Bless Our Troops

Re: Direct injection, port injection, dual injection.. [Re: miden851] #4676112
02/24/18 06:11 AM
02/24/18 06:11 AM
Joined: Jun 2005
Posts: 772
Danville, Indiana
IndyFan Offline
IndyFan  Offline
Joined: Jun 2005
Posts: 772
Danville, Indiana
This is why I was very happy to hear that the updated Pentastar in my new Jeep JL Wrangler does not have direct injection.

On the other hand, I didn't know anything about issues with DI when I purchased my Ford Transit Ecoboost. However, when they tore my engine down after a quick oil change place ruined it by improperly installing the oil filter, the Ford dealer told me the valves actually looked pretty good. It had about 85,000 miles on it. I ran Mobil 1 EP 5w30 exclusively from the first oil change onward. A couple of OCI's went out as far as 10,000 miles, so I feel pretty good about that plan. My understanding is that Mobil 1 AP was developed moreso with turbo DI engines in mind, so I may switch to that on my new (factory rebuild) Ecoboost, and continue with 10k OCI's.

I wonder if the NOACK changes on the oil as it gets miles on it?


18 Jeep JLUR Wrangler 3.6 13k
15 Ford Transit 105k, Reman 3.5 @85k
08 Jeep Wrangler 3.8 127k
01 Ford F150 Crew 5.4 89k
99 Mercedes E430 Sport 90k
Re: Direct injection, port injection, dual injection.. [Re: IndyFan] #4676150
02/24/18 07:15 AM
02/24/18 07:15 AM
Joined: Jul 2005
Posts: 30,966
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,966
NY
Originally Posted By: IndyFan
This is why I was very happy to hear that the updated Pentastar in my new Jeep JL Wrangler does not have direct injection.



Yes! I'm hoping I can grab a new GC before they make the change to DI. Otherwise I'll wait a few years and see how the early adopters do with Chrysler's DI in the Pentastar.


God Bless Our Troops

Re: Direct injection, port injection, dual injection.. [Re: miden851] #4677922
02/25/18 05:30 PM
02/25/18 05:30 PM
Joined: Feb 2016
Posts: 596
GA
miden851 Offline OP
miden851  Offline OP
Joined: Feb 2016
Posts: 596
GA
so the takeaway from the video and the overall sentiment that is out there, we should stick to the past

in my case that means I keep Mazda as long as I can, and get rid of CRV and get the one 10 years old!


2008 Mazda6i GT; @208K miles
2016 Honda CR-V EX-L; @36K miles
Re: Direct injection, port injection, dual injection.. [Re: miden851] #4677949
02/25/18 05:54 PM
02/25/18 05:54 PM
Joined: May 2002
Posts: 21,188
Oakville, Ontario
Patman Offline
Patman  Offline
Joined: May 2002
Posts: 21,188
Oakville, Ontario
I am slightly worried about the fact that my Corvette has DI but at the same time there are a few people with 2014 Corvettes out there now that are above the 60k mark and none have reported any issues at all related to DI. Hopefully once people start getting to 100k and beyond they will still have no issues. I do plan on putting at least 250k on my car.


2018 Corvette, 9k, M1 ESP Formula 5w30 & NAPA Gold
2006 Civic EX Coupe, 148k, PUP 5w20 & Fram Ultra
2010 BMW 328i X-Drive,110k, GC 0w40 & Fram Ultra

Re: Direct injection, port injection, dual injection.. [Re: Patman] #4678237
02/25/18 10:18 PM
02/25/18 10:18 PM
Joined: Oct 2011
Posts: 373
ND
gonefishing Offline
gonefishing  Offline
Joined: Oct 2011
Posts: 373
ND
Originally Posted By: Patman
I am slightly worried about the fact that my Corvette has DI but at the same time there are a few people with 2014 Corvettes out there now that are above the 60k mark and none have reported any issues at all related to DI. Hopefully once people start getting to 100k and beyond they will still have no issues. I do plan on putting at least 250k on my car.


While not the exact same motor the DI system is pretty much the same on your Corvette's LT1 as it is on my Sierra's L86. I have 115,000 miles on this vehicle with no fuel or engine issues. I do run a catch can.


2014 GMC Sierra 1500 SLT All-Terrain 5.3 4x4
Re: Direct injection, port injection, dual injection.. [Re: miden851] #4678889
02/26/18 03:45 PM
02/26/18 03:45 PM
Joined: Jul 2009
Posts: 11,194
Albany, NY
Nick R Offline
Nick R  Offline
Joined: Jul 2009
Posts: 11,194
Albany, NY
I have 94k miles on my DI focus with no silly intake cleaning garbage, and I have no performance or economy issues of any kind related to DI. Not to say some DI engines don't have problems, but they don't all.

Re: Direct injection, port injection, dual injection.. [Re: miden851] #4680620
02/28/18 01:36 PM
02/28/18 01:36 PM
Joined: Jan 2018
Posts: 251
KS
red7404 Offline
red7404  Offline
Joined: Jan 2018
Posts: 251
KS
that carbon build up can be fixed. with OUT taking the heads off. IMHO. with http://www.ampcolubes.com/ which lets you lubricate the intake valves with Marvel Mystery Oil. throu the intake track. IMHO.

Re: Direct injection, port injection, dual injection.. [Re: red7404] #4680624
02/28/18 01:40 PM
02/28/18 01:40 PM
Joined: Jul 2009
Posts: 11,194
Albany, NY
Nick R Offline
Nick R  Offline
Joined: Jul 2009
Posts: 11,194
Albany, NY
Originally Posted By: red7404
that carbon build up can be fixed. with OUT taking the heads off. IMHO. with http://www.ampcolubes.com/ which lets you lubricate the intake valves with Marvel Mystery Oil. throu the intake track. IMHO.


This sounds like something that will be completely unnecessary running with normal gasoline. Maybe useful to some degree for LPG and CNG vehicles, but I highly doubt it would be worth it on a normal engine.

Re: Direct injection, port injection, dual injection.. [Re: red7404] #4680625
02/28/18 01:41 PM
02/28/18 01:41 PM
Joined: Jul 2005
Posts: 30,966
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,966
NY
Originally Posted By: red7404
that carbon build up can be fixed. with OUT taking the heads off. IMHO. with http://www.ampcolubes.com/ which lets you lubricate the intake valves with Marvel Mystery Oil. throu the intake track. IMHO.

A good old inverse oiler. I mentioned it years ago, when the DI problem threads first started popping up. I took some heat, my bet is it would work, or help a great deal. I'd plumb one in if I had a vehicle with a DI engine that was prone to carbon build up problems.


God Bless Our Troops

Re: Direct injection, port injection, dual injection.. [Re: miden851] #4681482
03/01/18 12:18 PM
03/01/18 12:18 PM
Joined: Jan 2018
Posts: 251
KS
red7404 Offline
red7404  Offline
Joined: Jan 2018
Posts: 251
KS
NICK. normal gasoline IS the problem. it has NO lube. be cause of the ethanol. where else does the car maker have steel to steel with NO lube. just talk to some one that has a ford ecobost engine. some time ago, the ONLY fix for the carbon build up that ford had was to remove the head a scrap the carbon. i would be VERY VERY embarest to put out a product like that

Re: Direct injection, port injection, dual injection.. [Re: miden851] #4681498
03/01/18 12:42 PM
03/01/18 12:42 PM
Joined: Apr 2007
Posts: 2,997
WI.
dblshock Offline
dblshock  Offline
Joined: Apr 2007
Posts: 2,997
WI.
30k on my 1.5T without issue..constant juiced fuel and 0/40 motor oil, fingers crossed.


16 Civic Coupe Touring 38k
640:1 TCW-3 E091
Edge 0/40 XG7317
Firehawk Indy 500

06 4Runner SR5 146k
640:1 TCW-3
PP 5/30 XG3614
Falken Wildpeak AT3W
Re: Direct injection, port injection, dual injection.. [Re: red7404] #4681539
03/01/18 02:06 PM
03/01/18 02:06 PM
Joined: Jul 2009
Posts: 11,194
Albany, NY
Nick R Offline
Nick R  Offline
Joined: Jul 2009
Posts: 11,194
Albany, NY
Originally Posted By: red7404
NICK. normal gasoline IS the problem. it has NO lube. be cause of the ethanol. where else does the car maker have steel to steel with NO lube. just talk to some one that has a ford ecobost engine. some time ago, the ONLY fix for the carbon build up that ford had was to remove the head a scrap the carbon. i would be VERY VERY embarest to put out a product like that


Man I'm sure glad you told me that normal gasoline has no lubrication properties and my engine is going to explode while it's new... Oh wait, I actually have 94k miles on my direct injected 2.0L from Ford and it runs perfectly, all on regular 10% ethanol gasoline. Try again with the FUD.

Re: Direct injection, port injection, dual injection.. [Re: miden851] #4681560
03/01/18 02:36 PM
03/01/18 02:36 PM
Joined: Dec 2006
Posts: 8,016
Canuck living in California
KrisZ Offline
KrisZ  Offline
Joined: Dec 2006
Posts: 8,016
Canuck living in California
DI engines have different valve seat material which is much harder. Similar to factory CNG vehicles. They don't need any lubrication.


2015 Dodge Grand Caravan-27k miles.
2006 Mazda 3-163k miles
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