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Are we taking a step backwards with D.I. Engines? #4548618
10/19/17 07:38 PM
10/19/17 07:38 PM
Joined: Dec 2016
Posts: 453
Indiana
5AcresAndAFool Offline OP
5AcresAndAFool  Offline OP
Joined: Dec 2016
Posts: 453
Indiana
We haven't seen a whole lot of issues with fuel dilution since the carburetor days until recently. These Engines with direct injection seem to have alot of issues, enough that its to the point I think i would avoid buying one if possible.

I hate to sound like "that guy", but can these direct injection engines get 300k plus on them with no issues like many recent gasoline engines?

Now I know I am painting a broad stroke here, I am sure some are more problematic than others, but they all seem hard on their oil to an extent, and many have fuel dilution issues.

Am I just being stubborn?

Re: Are we taking a step backwards with D.I. Engines? [Re: 5AcresAndAFool] #4548621
10/19/17 07:42 PM
10/19/17 07:42 PM
Joined: Dec 2002
Posts: 42,085
New Jersey
JHZR2 Offline
JHZR2  Offline
Joined: Dec 2002
Posts: 42,085
New Jersey
What if, just what if, oils were improved to better accommodate the dilution, while engine controls were better optimized to reduce it?

How many vehicles have you recently taken to 300k without the car rotting out around the engine?

Re: Are we taking a step backwards with D.I. Engines? [Re: 5AcresAndAFool] #4548625
10/19/17 07:46 PM
10/19/17 07:46 PM
Joined: May 2010
Posts: 9,051
North Carolina
spasm3 Offline
spasm3  Offline
Joined: May 2010
Posts: 9,051
North Carolina
Originally Posted By: 5AcresAndAFool
We haven't seen a whole lot of issues with fuel dilution since the carburetor days until recently. These Engines with direct injection seem to have alot of issues, enough that its to the point I think i would avoid buying one if possible.



So far i have avoided them. I bought the 13 elantra and one of the factors was that it is MPFI. Factored the same thing in when we bought the 17 elantra with my son.

I think DI will get better over time. My next vehicle will probably be DI, but I'm putting it off as long as possible so the technology can mature.

Last edited by spasm3; 10/19/17 07:46 PM.

13 elantra 70k 5w30 QSUD
03 chevy avalanche79k synpwr 10w30
01 saturnsc1 185k synpwr rebuilt
17 mazda cx-5 5600 miles m1 0w30
Re: Are we taking a step backwards with D.I. Engines? [Re: 5AcresAndAFool] #4548626
10/19/17 07:46 PM
10/19/17 07:46 PM
Joined: Oct 2009
Posts: 3,222
Wet side WA
JohnnyJohnson Offline
JohnnyJohnson  Offline
Joined: Oct 2009
Posts: 3,222
Wet side WA
Originally Posted By: 5AcresAndAFool
We haven't seen a whole lot of issues with fuel dilution since the carburetor days until recently. These Engines with direct injection seem to have alot of issues, enough that its to the point I think i would avoid buying one if possible.

I hate to sound like "that guy", but can these direct injection engines get 300k plus on them with no issues like many recent gasoline engines?

Now I know I am painting a broad stroke here, I am sure some are more problematic than others, but they all seem hard on their oil to an extent, and many have fuel dilution issues.

Am I just being stubborn?


No 20K plus is a lot of money to be spending on a potential car with an engine issue.

I'm going to see what this new high tech engine brings to Mazda if it even happens. But I have time to burn not money.


Last edited by JohnnyJohnson; 10/19/17 07:53 PM.

2004 Corolla 124805
Out: VML 5w-30 TG4967 OCI 5007 Miles
In: EDGE EP 5W-30 Bosch 3311 122537 7-18-18
2006 Duramax 74277
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 74705 4-22-18
Re: Are we taking a step backwards with D.I. Engines? [Re: 5AcresAndAFool] #4548631
10/19/17 07:48 PM
10/19/17 07:48 PM
Joined: Jan 2009
Posts: 2,377
wi
dave123 Offline
dave123  Offline
Joined: Jan 2009
Posts: 2,377
wi
100k+ on my skyactiv DI Mazda3 runs like day I bought it not one single issue yet. Although I may be biased but I think they have best technology hands down.

Last edited by dave123; 10/19/17 07:49 PM.
Re: Are we taking a step backwards with D.I. Engines? [Re: JHZR2] #4548632
10/19/17 07:48 PM
10/19/17 07:48 PM
Joined: Dec 2016
Posts: 453
Indiana
5AcresAndAFool Offline OP
5AcresAndAFool  Offline OP
Joined: Dec 2016
Posts: 453
Indiana
Originally Posted By: JHZR2
What if, just what if, oils were improved to better accommodate the dilution, while engine controls were better optimized to reduce it?

How many vehicles have you recently taken to 300k without the car rotting out around the engine?


I wont run a car up to 300k at this point in my life, not many do.

I have a friend with an 07, with 370k on it.

I dont drive that much anymore, but I when I did I had a 4 year old car with almost 200k on it. My wife and I worked opposite shifts and we both commuted a distance using that car.

Re: Are we taking a step backwards with D.I. Engines? [Re: 5AcresAndAFool] #4548634
10/19/17 07:49 PM
10/19/17 07:49 PM
Joined: Jul 2009
Posts: 383
queens
babyivan Offline
babyivan  Offline
Joined: Jul 2009
Posts: 383
queens
I own a 2017 WRX and have not noticed any fuel/oil dilution. I do change my oil though no later than 2750 miles, which is less than half what Subaru recommends. I am more concerned about carbon build up, but I flog her regularly, so I don't think it will be too bad.


17 WRX 6 speed
Re: Are we taking a step backwards with D.I. Engines? [Re: 5AcresAndAFool] #4548639
10/19/17 07:51 PM
10/19/17 07:51 PM
Joined: Jul 2017
Posts: 25
Florida
Brett776 Offline
Brett776  Offline
Joined: Jul 2017
Posts: 25
Florida
I have no desire for direct injection, Iíll wait till itís more proven. I have a company car so the better mpg argument isnít good enough. I only drive my truck on the weekends.

Re: Are we taking a step backwards with D.I. Engines? [Re: 5AcresAndAFool] #4548642
10/19/17 07:53 PM
10/19/17 07:53 PM
Joined: May 2014
Posts: 1,232
Minnesota
philipp10 Offline
philipp10  Offline
Joined: May 2014
Posts: 1,232
Minnesota
Well I have had experience with one DI engine. A 2013 Honda Accord K24. I was following the OLM and at 9000K, at 10% life left, the oil looks and smelled just fine. The DI didn't seem to affect the oil in this car....and btw, not a drop was used.

Re: Are we taking a step backwards with D.I. Engines? [Re: 5AcresAndAFool] #4548645
10/19/17 07:55 PM
10/19/17 07:55 PM
Joined: Nov 2008
Posts: 9,042
Phoenix
dishdude Offline
dishdude  Offline
Joined: Nov 2008
Posts: 9,042
Phoenix
I've had a few DI cars now, no issues to report.


2018 Challenger SRT
Re: Are we taking a step backwards with D.I. Engines? [Re: dishdude] #4548654
10/19/17 08:02 PM
10/19/17 08:02 PM
Joined: Jan 2008
Posts: 10,680
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,680
OH
Originally Posted By: dishdude
I've had a few DI cars now, no issues to report.


Right but none of those cars you had very long.

Re: Are we taking a step backwards with D.I. Engines? [Re: 5AcresAndAFool] #4548656
10/19/17 08:05 PM
10/19/17 08:05 PM
Joined: Sep 2010
Posts: 7,485
S California
OneEyeJack Offline
OneEyeJack  Offline
Joined: Sep 2010
Posts: 7,485
S California
I thought GDI was just a hack to cool down the combustion chamber to meet smog regulations.

Other than that I wonder if we'd ever see GDI on a daily driver.

Back in the old days of carburetors and fuel dilution, it was taken care of with thicker oil and more frequent oil changes. It if was a problem it was averaged in with normal wear and tear and no one thought much of it.

Re: Are we taking a step backwards with D.I. Engines? [Re: 5AcresAndAFool] #4548662
10/19/17 08:14 PM
10/19/17 08:14 PM
Joined: Aug 2003
Posts: 10,782
Buffalo, NY
JTK Offline
JTK  Offline
Joined: Aug 2003
Posts: 10,782
Buffalo, NY
Is fuel dilution a thing for all DI gasoline engines? Makes me wonder if it's not a specific usage induced thing. What kind of scares me more is the high pressure fuel pump/sending units and associated components. I couldn't imagine what replacement cost is for a DI FSU.


2017 Ram 1500 4x4, 3.6L. 2016 Nissan Quest SV (Babe magnet IV)
Re: Are we taking a step backwards with D.I. Engines? [Re: 5AcresAndAFool] #4548665
10/19/17 08:18 PM
10/19/17 08:18 PM
Joined: Apr 2012
Posts: 5,157
MA
Wolf359 Offline
Wolf359  Offline
Joined: Apr 2012
Posts: 5,157
MA
I'm not sure how it's a step backwards. It's supposed to give you better mpg and more power or pick one over the other. Mercedes went to DI in 2012 in their E class. Went from 268hp in the previous 3.5L engine to 302hp in their new engine and it got better gas mileage too. Went from 17 city/24 highway to 19 city/28 highway afterwards.

Re: Are we taking a step backwards with D.I. Engines? [Re: SatinSilver] #4548666
10/19/17 08:19 PM
10/19/17 08:19 PM
Joined: Nov 2008
Posts: 9,042
Phoenix
dishdude Offline
dishdude  Offline
Joined: Nov 2008
Posts: 9,042
Phoenix
Originally Posted By: SatinSilver
Originally Posted By: dishdude
I've had a few DI cars now, no issues to report.


Right but none of those cars you had very long.


5 cars, each run up to about 40k. No fuel dilution or other issues. I see no reason to be afraid of DI.


2018 Challenger SRT
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