Specific Gravity of Diesel Fuel VS Motor Oil
The reason for the question is....in the event of an injector not closing properly and letting fuel leak into the cylinder will diesel fuel float on motor oil or is it reverse?
Forum Discussion
Motor oil and diesel fuel are mutually soluble, so very unlikely to form separate layers. Between suck-&-mix of oil pump and oil spray coming off the bearings and bottom edges of cylinder walls, you got some strong mixing going on. If you are getting diesel in the crankcase, you gotta change the oil before low lubricity ruins expensive pieces.
