oil over full/ diesel fuel mix?

[the witchdoctor]

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A week or so ok, my truck acted like it had an injector stick. Today I go to check oil and it was what I woul dguess at 3 quarts or nore over with deisel mixed in... i have drained and keeping an eye on it.... 03 f250 super duty 7.3

[Austinj427]

hmmmmm. Are you sure its not coolant?

[the witchdoctor]

Pretty sure. It did float on top when I drained the oil...

[dray8165]

I doubt it is diesel - it would mix with the oil since both are hydrocarbons. Water can get into your oil with a bad oil cooler. Here is a source of the rebuild kit with a .pdf instruction page:

Replacement O-rings for Ford Diesel Engines

Oil can get into the diesel with a bad lower injector o-ring, normally noticed by blue smoke and observing oil discoloration in your fuel filter.

You could probably tell what it is with a match - diesel burns slowly - water doesn't burn at all... Maybe dip a stick in the suspect fluid and light er up...

[the witchdoctor]

Thanks Guys! I meant to type it DIDN'T float...lol.... I suspect it is diesel.. gonna keep my eye on it for a couple of days and then see where to go from there..... I assume this is a pretty common issue with these motors?

[dray8165]

It is not real common, but is is real dangerous. Diesel will dilute your oil and if you run it mixed, you'll end up tearing up a bearing. I wouldn't drive it until I knew where the diesel was coming from. These motors are just too expensive to rebuild / replace to risk it.

[the witchdoctor]

Thanks! First diesel I have ever had, have race cars and such.... I am hoping it was from where it acted up one day last week like it was misfiring an injector and loaded the cylinder up.... hopefully! Will let you know when I find out.

[mikenj]

Did you ever find out? I think I have the same problem......was 2 qts over filled and after 150 miles it was higher again.