Fuel in Motor Oil

Frank @ TX · July 08, 2011, 01:00:50 PM

Hi
I don't have this problem but I do remember a while back someone did .
To test if there is fuel in the oil there was something about putting a drop of oil on a piece of paper.
Does any one remember that test and know what kind of paper ?
I want to know just for file info.
Thanks
Frank

luvrbus · July 08, 2011, 01:12:30 PM

A paper towel Frank

good luck

Frank @ TX · July 08, 2011, 01:31:40 PM

Thanks for that info.
If there is fuel what will the paper towel show ?
Thanks
Frank

Oonrahnjay · July 08, 2011, 03:26:55 PM

Quote from: Frank @ TX on July 08, 2011, 01:31:40 PMThanks for that info.
If there is fuel what will the paper towel show ? Thanks
Frank

You can just drip a few drops with the dipstick. If you have fuel, you'll see a spot of dark oil where you dropped it but there will be a "bulls eye" of lighter and yellowish colored liquid. That's the fuel that's spread out. It's hard to anticipate exactly since the "bulls eye" will be larger if there's more fuel and smaller is there's less.

opus · July 08, 2011, 03:51:33 PM

Get a legit sample done of the oil from Blackstone or such. That will tell you far more than a paper towel.

buswarrior · July 10, 2011, 03:38:16 PM

The paper towel test is a good one for showing you have a problem right now.

The $20 or so for a routine oil sample when changing the oil lets you know you have no problem, or warns you are developing one. Call it an early warning system and preventive maintenance.

And, just like going to the doctor, one test result doesn't mean as much as a string of tests showing trends, or lack there of.

Our DD 2 stroke fuel delivery system exposes us to fuel into the engine oil, as the bits and pieces are all under the valve covers. Any deterioration, breakage, seepage or leak goes into the oil.

Who needs to be suspicious?

All things being equal,
your engine seems to be using less oil than it used to...
watch out,
it may be adding fuel to the crankcase.

happy coaching!
buswarrior

BUR · July 10, 2011, 08:55:38 PM

I have had this problem twice. The first time after a engine rebuild, I had a high pressure (high rpm) O-ring leak. The second time I had an injector leak. When you are stopped and check your oil level and your engine is manufacturing oil, that's not a good thing. You can smell the fuel on the dip stick. When you are on the the road if you notice the oil pressure lower than normal over a period of miles, check the dipstick. Wilbur