Ask a Harley rider: "What does a Harley Davidson and a hound dog have in common?" and he may come up with the answer: "Easy, the H and the D." - Well done, good answer! That and the fact that they both spend a lot of time in the back of a pick-up... Had the oil changed on my diesel pick-up and as before they filled in too much. When I showed them the dipstick, they started the engine, let it run for a minute, then checked again, and it was a bit above the mark. This morning though, cold engine, it was way over the upper mark. Question: do you check the oil level on a diesel pick-up when it's cold or at "operating temperature"? Sorry about a "car question", but I didn't find a website that would answer my question.