Bad demandate

[Oilysnowman]

neither is the oil supposed to be that black and nasty either. - Someone not changing the oil nearly often enough?.
[/quote]

I change the oil every 250 hours, which divided by an average of 60km/h (which I highly doubt I even get that hauling where I do) is just under 10,000 miles per oil change. Has RR program, and after the cams and rockers I’m changing now, the only thing on the engine I haven’t changed is the ecm, wiring harness, and crank. I’ve changed alll the sensors that you often talk of, with no difference.