Fuel in oil

[jsphlynch]

Any increase in crankcase level from raw fuel contamination is too much.

Provide a reference, please.

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[aeroshots]

My truck has done this since day one. I have a huge heated garage I park the truck in. I spend a lot of time working on various projects in the garage and every now and then I will here the fuel pump prime even though my key fob is in the house and I am not on the app or anything. I think it's probably normal as I did not start having problems until recently. I do have a lot of fuel contamination in my oil, but that only started in the past few thousand miles and I am over 15,000 miles on the truck. The oil sample the dealer sent in for testing indicated 12% fuel in my oil and that was at 498 miles after the oil change and the oil level was just past the max mark on the dipstick. When I first noticed the oil level was very high, it was up into the twist part of the dipstick, I changed the oil then, which was about only 3,000 miles old, and I drained out nearly 7.8 qts! Had to be well over 20% dilution. It has been to the dealer several times and is going back tomorrow and they are giving me a loaner. Ford is having them do a series of checks, compression, injectors, etc. From others on this board, I suspect it will probably end up being HPFP? Just hope the engine isn't toast, or worse yet, gives out after the powertrain warranty expires.

Are ya'll opening the driver door when you then hear the fuel pump prime?

 

[2ford]

Interesting that they note the viscosity is in the 5w/20 range. I wonder if that's just from degradation of the oil, or if the factory fill is a little thinner than 5w/30.

Makes me wonder to they say no fuel dilution but show .5% in the chart. I wouldn't think that amount would change the viscosity.

 

[2ford]

Provide a reference, please.

Increased crankcase level above the max level, fuel dilution changes the oil viscosity are a couple that come to mind.

 

[MotoWojo]

Are ya'll opening the driver door when you then hear the fuel pump prime?

Yup, I hear it prime when I open the door first thing in the morning.

 

[MotoWojo]

Makes me wonder to they say no fuel dilution but show .5% in the chart. I wouldn't think that amount would change the viscosity.

The first time I noticed increased crank case levels, I had over 13,000 miles on the truck. At that time, when I checked the oil and it was up to the twist, I had a little over 3000 miles since the last oil change, I changed it immediately and after about 500 miles it was about an 1/8in over the max mark and I took to the dealer. They took an oil sample and sent it out for testing and it came back at 12% fuel dilution. I wonder how high the dilution was when it was up to the twist? At that time, the service tech told me that he wouldn't be worried if it was that high at a regular oil change interval, but at 500 miles, he agreed that something wasn't right. My last F150 lasted me 12 years, I am starting to think that will not be possible for this truck.

 

[jsphlynch]

Makes me wonder to they say no fuel dilution but show .5% in the chart. I wouldn't think that amount would change the viscosity.

Nice job on that quick edit. Would have been embarassing if you had publicly equated <0.5% dilution with a quart of fuel.

 

[jsphlynch]

Increased crankcase level above the max level...

Unless the "max" mark is located such that it takes into account the possibility of up X% increase due to fuel. Question is then what is "X"?

...fuel dilution changes the oil viscosity...

Unless that decrease in viscosity is anticipated and still stays within the tolerances of the engine. Question is then what are the tolerances of the engine?

These aren't references, they're ideas for potential issues. I agree, I'm concerned about these effects of fuel dilution causing actual issues. What I'm hoping to figure out is at what point do the detrimental effects become issues?

 

[HenryMac]

You are missing my point I'm talking about raw fuel contamination that increases the crankcase level. I agree that blow by contaniments get trapped in the oil hence the need to change oil periodically

Our ongoing discussion was based on your post, where you stated, twice, that your Buick never had any fuel dilution. My point, ad nauseam,, is that is an incorrect statement.

I never had fuel dilution in my 2011 DI 2.4 buick had 40k on it when I traded it in. I did my oil changes never ever had increased level in oil never any fuel dilution

We're in agreement that raw fuel contamination is the "problem" some folks are having with their Rangers. The question is... what is causing it.

 

[2ford]

Our ongoing discussion was based on your post, where you stated, twice, that your Buick never had any fuel dilution. My point, ad nauseam,, is that is an incorrect statement.



We're in agreement that raw fuel contamination is the "problem" some folks are having with their Rangers. The question is... what is causing it.

My bad I should have been more specific. Lets try this the oil never smelt like gas and consequently the oil level never increased.

 

[outdoorphotog]

I almost have 5k since my last oil change, for curiosity sake i want to get a blackstone analysis now. I had smelled my dipstick the other day and it was slightly over the max and smelled kind of like fuel.

 

[MotoWojo]

Quick update. I have 450 miles since the HPFP and injectors were changed. during the first 300 miles, the oil level rose about a 1/4in to just at the bottom edge of the max hole. The past 150 miles it has been holding steady there. I am hoping it stays that way but I am still worried that it might be because it has been much warmer here lately (hot). I will update if anything develops further or not.

 

[N. J. Jim]

Quick update. I have 450 miles since the HPFP and injectors were changed. during the first 300 miles, the oil level rose about a 1/4in to just at the bottom edge of the max hole. The past 150 miles it has been holding steady there. I am hoping it stays that way but I am still worried that it might be because it has been much warmer here lately (hot). I will update if anything develops further or not.

I think there's a pattern starting here . I have about 600 miles since HPFP change, same thing for me oil level rose to just under the upper hole the first few hundred miles. It has stayed at that level for about 300 miles now. Hoping when the oil is changed there will be little or no rise in the oil level.

 

[Tra1969]

I think there's a pattern starting here . I have about 600 miles since HPFP change, same thing for me oil level rose to just under the upper hole the first few hundred miles. It has stayed at that level for about 300 miles now. Hoping when the oil is changed there will be little or no rise in the oil level.

Same results for me. Except i went obout 200 miles with no change then went up to top hole and staying there so far. Will check again this weekend.

 

[t4thfavor]

Is there a pattern of people who drive "carefully and with a light foot" experiencing fuel dilution, and people who "drive with copious amounts of skinny pedal" aren't?

I haven't noticed very much fuel smell in the oil, the level stays roughly the same, if not goes down a tiny bit over the 7500 mile change interval I've settled to.

My theory is that the people experiencing this don't get their engine oil hot enough to burn off the excess fuel, so it just stacks up. This engine has a big ol' oil cooler, so it takes a lot of load to get the hot enough for fuel to burn off.

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