Increase in the level of Engine Oil

Antifreeze could be getting into the oil also but chances are its fuel

 

I don't have much experience with Macks but I have seen injector lines and fuel return lines under the valve covers of engines leak and contaminate the oil.

 

If it's fuel you can usually tell with a white paper towel.

Take your dipstick and wipe it through the towel as straight as you can. Let the oil soak in and look for a "halo" around the dark oil mass.

If you see it, it's virtually a gaurantee you have fuel contamination to the level it needs immediate attention.

The most scientific and definite way to find out is a oil analysis and it will give you the contamination percentage.

 

If there is enough fuel intrusion getting into the crank case to raise the level noticeably, an strong odor of diesel should be evident. If it is anti-freeze contamination, the emulsion would look like chocolate milk, easily recognizable.

If the oil looks like oil, my money is on fuel contamination.

 

Best thing is to do oil analysis

 

Fuel in the oil. If it were coolant the oil would be milky colored.

 

Man.. if I had a truck doing that, I would allow it to overfill, drain off a gallon at the time and then sell the extra gallons of oil produced by your engine at the truckstop.

 

Hahaha! Funny stuff right there!

 

How soon are you going to get it fixed? That much fuel in the oil will destroy an engine in no time. I would drain the oil and put fresh in with at least one or two gallons of Lucas till you can get it fixed, but get it done asap.