Is anybody else experiencing fuel in their engine oil? I happen to work at a Equipment dealership and we run oil samples on all our equipment and vehicles. We have several 2008 F550's in our fleet of trucks and each of them are testing positive with fuel in engine oil. I personally own a 2008 F250 and took a sample last night and it also appears to have fuel in oil. My truck only has 5700 miles and this is about the same mileage we are seeing the problem on the F550's. The lab is telling us the oil has tested positive for fuel in oil above 4% by volume. On one of the trucks we have noticed that the oil sample came back with with the viscosity at 7.7 which is half of what the viscosity of new oil. I am curious as to how many others are noticing this. The dealership does not know how to fix at this time and they don't seem to be concerned.