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Actual damage from fuel dilution? #5137616
06/18/19 02:58 PM
06/18/19 02:58 PM
Joined: Jun 2017
Posts: 74
FL
Deontologist Offline OP
Deontologist  Offline OP

Joined: Jun 2017
Posts: 74
FL
Are there any actual reports of damage from fuel dilution? All I can find is people taking precautionary measures. Has fuel dilution actually resulted in a broken engine, especially for DI Honda's? Seems like there's not any actual stories of damaged Honda's, which makes me think the engineers accounted for fuel dilution.

Re: Actual damage from fuel dilution? [Re: Deontologist] #5137622
06/18/19 03:04 PM
06/18/19 03:04 PM
Joined: Nov 2012
Posts: 706
Ajax,Ontario, Canada
Pelican Offline
Pelican  Offline

Joined: Nov 2012
Posts: 706
Ajax,Ontario, Canada
There were some, but taken care of under warranty, if memory serves. I seem to recall that Honda xtended the warranty for some cars, but am not certain.

Re: Actual damage from fuel dilution? [Re: Deontologist] #5137624
06/18/19 03:05 PM
06/18/19 03:05 PM
Joined: Dec 2011
Posts: 6,349
North Carolina
rooflessVW Offline
rooflessVW  Offline

Joined: Dec 2011
Posts: 6,349
North Carolina
If fuel dilution kills an engine, it will be a slow death.


"Zed's dead baby, Zed's dead."
Re: Actual damage from fuel dilution? [Re: rooflessVW] #5137637
06/18/19 03:16 PM
06/18/19 03:16 PM
Joined: Jul 2005
Posts: 11,771
Maricopa Arizona
dave1251 Offline
dave1251  Offline

Joined: Jul 2005
Posts: 11,771
Maricopa Arizona
Originally Posted by rooflessVW
If fuel dilution kills an engine, it will be a slow death.



Much like age.


make the inside of your engine oil cap white.
don't use.
Re: Actual damage from fuel dilution? [Re: dave1251] #5137643
06/18/19 03:23 PM
06/18/19 03:23 PM
Joined: Dec 2011
Posts: 6,349
North Carolina
rooflessVW Offline
rooflessVW  Offline

Joined: Dec 2011
Posts: 6,349
North Carolina
Originally Posted by dave1251
Originally Posted by rooflessVW
If fuel dilution kills an engine, it will be a slow death.
Much like age.

Well, call it an accelerated death. Like smoking a pack a day.

It will shorten your life, and may cause a catastrophic failure.


"Zed's dead baby, Zed's dead."
Re: Actual damage from fuel dilution? [Re: Deontologist] #5137672
06/18/19 03:53 PM
06/18/19 03:53 PM
Joined: Apr 2018
Posts: 481
US
talest Offline
talest  Offline

Joined: Apr 2018
Posts: 481
US
It will also give the inside of your engine a good cleaning before you get that fuel diluted oil out of it.

Do something like fill the crankcase up with diesel fuel or kerosene, and it attacks every oil seal in your engine. Too much for too long, you may have problems where you did not before. Replace all oil with diesel or kerosene and let it idle a half hour as some say is probably the maximum aggressive tactic to clean out an old engine, then refill with oil, but did you damage the engine? Only if you damaged those seals.

Re: Actual damage from fuel dilution? [Re: Deontologist] #5137676
06/18/19 03:56 PM
06/18/19 03:56 PM
Joined: Dec 2016
Posts: 692
E. Tennessee
WhizkidTN Offline
WhizkidTN  Offline

Joined: Dec 2016
Posts: 692
E. Tennessee
According to Honda, damage from fuel dilution in the GDI engine is "a real thing":

https://www.wardsauto.com/engines/h...mp;elq2=31a505e3bfbd482e808a9f825fb38c41

Take a good look at that picture! I hope what was for effect and NOT as a result of the issue for them.

I think the issue is poor lubrication as the oil gets loaded up with gasoline byproducts to the point of greatly accelerated bearing/piston ring wear that eventually results in significant engine damage.
Honda has apparently had several "updates" to attempt to address it for their 1.5L engine. Don't know how effective that has really been as I don't own one.

Last edited by WhizkidTN; 06/18/19 04:01 PM.

His: '12 Kia Optima SX - 2.0L GDI Twin-Scroll Turbo [Tuned] (82K)
>EDGE 0W-40, Fram XG9688
Her's: '14 Nissan Rogue SL AWD - 2.5L NA (87K)
>EDGE 0W-20, Fram XG6607
Re: Actual damage from fuel dilution? [Re: Deontologist] #5137691
06/18/19 04:16 PM
06/18/19 04:16 PM
Joined: Sep 2010
Posts: 2,408
GA.
ChrisD46 Offline
ChrisD46  Offline

Joined: Sep 2010
Posts: 2,408
GA.
Shorter OCI's with DI engines and following the severe schedule with DI "short trippers" will help protect you from the affects of fuel dilution .


'17 Hyundai Sonata 2.4L GDI 5W30 Valvoline Advanced Syn / Fram Ultra
'10 Hyundai Elantra 2.0L 5W30 QSUD / Fram Ultra
'07 Kia Sedona 3.8L 5W30 M1 EP HM / Fram Ultra
Re: Actual damage from fuel dilution? [Re: WhizkidTN] #5137714
06/18/19 04:52 PM
06/18/19 04:52 PM
Joined: Apr 2018
Posts: 996
Somewhere in time
Imp4 Online content
Imp4  Online Content

Joined: Apr 2018
Posts: 996
Somewhere in time
Originally Posted by WhizkidTN
According to Honda, damage from fuel dilution in the GDI engine is "a real thing":

...
I think the issue is poor lubrication as the oil gets loaded up with gasoline byproducts to the point of greatly accelerated bearing/piston ring wear that eventually results in significant engine damage.
Honda has apparently had several "updates" to attempt to address it for their 1.5L engine. Don't know how effective that has really been as I don't own one.


Well here's what Honda thinks, taken straight from your linked article

Quote
Honda spokesman Chris Martin says abnormal oil dilution remains “extremely rare, especially outside of extremely cold weather areas.” The problem occurs when unburned fuel slips past piston rings and mixes with engine oil in the crankcase.


So if you're a member of the Saskatchewan short trippers club, you might be in trouble.

All others need not apply. Especially anyone who drives a vehicle that gets up to operating temperature on a semi-consistent basis.


2001 Mitsubishi Galant 2.4 - 165k+
Grandma's creampuff...
Re: Actual damage from fuel dilution? [Re: Deontologist] #5137718
06/18/19 04:57 PM
06/18/19 04:57 PM
Joined: Mar 2017
Posts: 10,023
...
PimTac Offline
PimTac  Offline

Joined: Mar 2017
Posts: 10,023
...
We have had a good number of UOAs posted here with high fuel dilution numbers yet wear metals were still low.


2017 Mazda CX5
Havoline Pro DS 0w20
Roki OEM filter.
Re: Actual damage from fuel dilution? [Re: PimTac] #5137721
06/18/19 05:01 PM
06/18/19 05:01 PM
Joined: May 2010
Posts: 10,259
out there
spasm3 Online content
spasm3  Online Content

Joined: May 2010
Posts: 10,259
out there
Originally Posted by PimTac
We have had a good number of UOAs posted here with high fuel dilution numbers yet wear metals were still low.



True, but UOA's are more of a measure of how the oil is holding up, not the engine. I think there was a BMW model a while back that was known for eating main bearings and it did not always show on uoas.

Last edited by spasm3; 06/18/19 05:16 PM.

13 elantra 78k 5w30 synpwr
03 chevy avalanche 83k synpwr 5w30
17 mazda cx-5 12300 miles m1 0w30
Re: Actual damage from fuel dilution? [Re: rooflessVW] #5137743
06/18/19 05:49 PM
06/18/19 05:49 PM
Joined: Jul 2005
Posts: 11,771
Maricopa Arizona
dave1251 Offline
dave1251  Offline

Joined: Jul 2005
Posts: 11,771
Maricopa Arizona
Originally Posted by rooflessVW
Originally Posted by dave1251
Originally Posted by rooflessVW
If fuel dilution kills an engine, it will be a slow death.
Much like age.

Well, call it an accelerated death. Like smoking a pack a day.

It will shorten your life, and may cause a catastrophic failure.



Unlike smoking fuel dilution is not the reason most cars are retired. The majority of cars are still discarded rather then sent to the junkyard because of failure.


make the inside of your engine oil cap white.
don't use.
Re: Actual damage from fuel dilution? [Re: Deontologist] #5137746
06/18/19 05:58 PM
06/18/19 05:58 PM
Joined: May 2019
Posts: 739
WA
Mad_Hatter Offline
Mad_Hatter  Offline

Joined: May 2019
Posts: 739
WA
The damage happens over time and ultimately reduces the engines life expectancy before major repairs are needed. A high fuel dilution % [can] be a sign of other problems like worn rings, leaky fuel injectors or incomplete combustion.

Re: Actual damage from fuel dilution? [Re: PimTac] #5137753
06/18/19 06:07 PM
06/18/19 06:07 PM
Joined: Jul 2005
Posts: 32,481
NY
demarpaint Offline
demarpaint  Offline

Joined: Jul 2005
Posts: 32,481
NY
Originally Posted by PimTac
We have had a good number of UOAs posted here with high fuel dilution numbers yet wear metals were still low.

We had a member a few years back with perfect UOAs and a blown engine. A UOA is a good tool, with limited purposes.

Fuel dilution as others stated can take its toll on an engine. How soon, or how much fuel is up for debate, but it can shorten the life of an engine.


God Bless Our Troops

Re: Actual damage from fuel dilution? [Re: PimTac] #5137872
06/18/19 08:22 PM
06/18/19 08:22 PM
Joined: Mar 2019
Posts: 134
Iowa City
Talent_Keyhole Offline
Talent_Keyhole  Offline

Joined: Mar 2019
Posts: 134
Iowa City
Originally Posted by PimTac
We have had a good number of UOAs posted here with high fuel dilution numbers yet wear metals were still low.


BlackStone provided 568 results for GMs 2.4l Ecotec engine from 2006 - 2017, used in a dozen different vehicles. GDI version of the same engine had twice the iron wear rate, elevated chromium levels when compared with the same engine that had port fuel injection. In those engines that were above 3 percent resulted in 3x the wear rate. Extremely high fuel dilution, copper, aluminum, lead were also elevated indicating damage to bearing material. Looking at individual UOAs will not show this trend.

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