Originally Posted by TBS-POPS
IF the EGR and the extra fuel injected to burn off the soot is getting by the rings to contaminate the oil to a degree that is harmful your engine is worn out. This is why you do oil samples to determine when it's time to rebuild at higher mileage intervals.
Yes. Thanks for the comment, since that's exactly the reason why I started this thread.
I know diesel engines can go more miles than most of us will ever drive, but, when buying used, we must worry about these kinds of things. So I worry about how the coach that I'll be buying has been cared for.
Do you recommend that before I buy a used coach that I should have the oil examined first? Would that be able to tell me some useful information about the state of the engine? What else can a prospective used DP buyer do in this respect?