Fuel in oil

[Michel Jeanneau]

This is kinda the opposite I experienced with my 2014 Subaru Forester (FB 25 engine)....where the combination of "recommended" 0W-20 oil and cheap rings was making the oil dissapear with some people losing a quart of oil in less than 1000 miles in some instances. In my case it was never more than a qt in 1900 miles, but be that as it may, I ended up getting a new engine at 38k miles anyway. I let that block break in with factory oil and after that used RedLine 5W30 full synthetic, changed every 5k miles (suggested OCI was 6k miles back then, 5k after a TSB from subaru). Well, with just under 400 miles on my truck, I went outside and checked....level right at the hash mark and no fuel smell, for what it's worth. Engine build date 22-oct-19

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[Kemo Sabe]

Following

 

[Tra1969]

9 k miles .oil changed at 4500 and 9k. no rise in level no noticeable smell in oil .oil was sorta still golden with the second oil change. I am thinking most don't have this worry .

just quick question, in your 9000 miles do you leave your stop/start feature on? Does it activate often? Thinking maybe this adds to the issue and with your doing good, weather you use it or not?

 

[u wish u could ride]

I have a night light plugged in the 110 outlet since about 700 miles.i never use sport mode,always put in 93 octane .commute 14 miles each way to work 5 days a week warm truck up when below 40 degree s out for 10 minutes.all winter long.wife also drives truck and she drives it fast as she is used to a 37 infiniti wich she also drives to fast.I get average 20.7 mpg but 19.7 last tank. that's about all I can think of .ps oil level is still spot on from last change (about 1050 miles ago)

 

[Tra1969]

I have a night light plugged in the 110 outlet since about 700 miles.i never use sport mode,always put in 93 octane .commute 14 miles each way to work 5 days a week warm truck up when below 40 degree s out for 10 minutes.all winter long.wife also drives truck and she drives it fast as she is used to a 37 infiniti wich she also drives to fast.I get average 20.7 mpg but 19.7 last tank. that's about all I can think of .ps oil level is still spot on from last change (about 1050 miles ago)

Thanks for the info. Im thinking the stop/start feature contributes to the fuel in the oil. Just a hunch, but when mine stops even after the restart feels like it kinda flooded acting for about a block and doesn't do that when i have it shut off. Going to change the oil at 1000 mile and keep the feature off and see if that makes a difference. Thanks again for the info.

 

[acsnowrider]

Thanks for the info. Im thinking the stop/start feature contributes to the fuel in the oil. Just a hunch, but when mine stops even after the restart feels like it kinda flooded acting for about a block and doesn't do that when i have it shut off. Going to change the oil at 1000 mile and keep the feature off and see if that makes a difference. Thanks again for the info.

As diagnosed earlier in this thread, I am getting 25 MPG in the city/30 on hwy, have verified no increase in crankcase level, and never shut off my auto start/stop feature, with the majority of our travels within the city. Total mileage now at 9300, purchased in Aug, and third oil change done 2/24.
I believe fuel mileage is a very good indicator initially, to be watching the crank case level, and I agree, as many here suspect, the High Pressure Fuel Pump as the possible/ likely culprit.

 

[Tra1969]

As diagnosed earlier in this thread, I am getting 25 MPG in the city/30 on hwy, have verified no increase in crankcase level, and never shut off my auto start/stop feature, with the majority of our travels within the city. Total mileage now at 9300, purchased in Aug, and third oil change done 2/24.
I believe fuel mileage is a very good indicator initially, to be watching the crank case level, and I agree, as many here suspect, the High Pressure Fuel Pump as the possible/ likely culprit.

Thanks good info. Appreciate the help. Not really going to worry much till after the first oil change. Mines not over full but does smell like gas. But I believe I need to get through the break in period before I will really know.

 

[Lunchbox88]

As diagnosed earlier in this thread, I am getting 25 MPG in the city/30 on hwy, have verified no increase in crankcase level, and never shut off my auto start/stop feature, with the majority of our travels within the city. Total mileage now at 9300, purchased in Aug, and third oil change done 2/24.
I believe fuel mileage is a very good indicator initially, to be watching the crank case level, and I agree, as many here suspect, the High Pressure Fuel Pump as the possible/ likely culprit.

Your gas mileage is insanely good. Your city miles must be quite different from mine...Hell even my good highway mileage is like 24-25mpg and that's on the interstate with cruise control on.

 

[acsnowrider]

Your gas mileage is insanely good. Your city miles must be quite different from mine...Hell even my good highway mileage is like 24-25mpg and that's on the interstate with cruise control on.

Yours is a 4x4??? My truck is 4x2 I also found the mileage increased, when I added the Composite Tonnueau Cover--Weighs about 80 lbs, but the fuel mileage went up about 20%- Big surprise!! And I just bought it for added security!!

 

[Lunchbox88]

Yours is a 4x4??? My truck is 4x2 I also found the mileage increased, when I added the Composite Tonnueau Cover--Weighs about 80 lbs, but the fuel mileage went up about 20%- Big surprise!! And I just bought it for added security!!

Interesting. I have an Extang Solid Fold 2.0 and I didnt notice any significant difference really in fuel mileage. Yes mine is 4x4 so that hits me a bit.

 

[OWSportninja]

Sorry for the picture being sideways lol but anyways finally got my analysis back. 2.8% fuel dilution and it is causing the viscosity of the oil to go down prematurely. Also notice the flashpoint of the oil. And this is only 4k miles on Amsoil XL which I ran in my focus for almost 9kmiles with no issues. There is definitely something going on here. Having my service advisor write up another ticket and seeing how Ford is going to tell us to handle it. I'll update as I get more info.

 

[2ford]

Thanks for the info. Im thinking the stop/start feature contributes to the fuel in the oil. Just a hunch, but when mine stops even after the restart feels like it kinda flooded acting for about a block and doesn't do that when i have it shut off. Going to change the oil at 1000 mile and keep the feature off and see if that makes a difference. Thanks again for the info.

Why do you suspect the stop/start feature contributes to fuel in the crankcase. My ranger now has 4500 miles on it. Never had fuel in the oil I use the start stop feature. Oil change at 3k no issues. Last trip 2800 miles avg. 25mpg combined.

 

[Langwilliams]

My oil is over full an smells like gas. I have 2400 miles on it, never use the start/stop an drive about 11 miles each way to work so it should get good an warm. Been avg around 18-19 combined with 87. I ran a tank of 91 an got 17 mpg but we had a cold snap. I rarely use the sport mode either. I'm just over a quarter tank into this tank an I tried 89 an it's been quite a bit warmer an so far it's a little over 20 mpg.

I made an appointment at the dealership svc department for next Fri. I asked if they had any complaints of gas in the oil an they said none at all. I'm hoping for a free oil change to get rid of the gassy oil an hope it goes away.

 

[hawk43]

So I am now at almost 3k miles...Check oil weekly same time early morning and stone cold engine since the notice of gas smell...Oil level is steady but gas smell is there.. First oil change will be at 5k but sill keep checking my oil level...


autos top has been off for most of trucks life using night light and I make sure I get it up to temp when I drive it....So no short one mile treks... Gas mileage is steady in the 21/22 range for rural driving in winter with some picking up grand kids in school line...

 

[Doc]

So I am now at almost 3k miles...Check oil weekly same time early morning and stone cold engine since the notice of gas smell...Oil level is steady but gas smell is there.. First oil change will be at 5k but sill keep checking my oil level...


autos top has been off for most of trucks life using night light and I make sure I get it up to temp when I drive it....So no short one mile treks... Gas mileage is steady in the 21/22 range for rural driving in winter with some picking up grand kids in school line...

Send in a sample when you change at 5000.
regards

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