Motor oil.

[birddog]

I use rotella in mine, my 2007 just turned 621,000 miles today and she still purrs like a kitten. I traded in my last truck with just over 750,000 on the clock and she was still running strong.

Must be a cummins

[car-15]

Must be a cummins

Nope, series 60 Detroit

[birddog]

A little bit bigger then. I assumed it was a light truck. You like to keep them new then.

[car-15]

A little bit bigger then. I assumed it was a light truck. You like to keep them new then.

yep, we run with a 6 year lease with 750,000 miles and then turn them in and get a new one, all normal service, equipment failure's, road service, and permit's are included (24,000 mile oil changes, ifta, plates, etc.) we just pay for normal wear and tear items.

[Zcsdkr]

rotella.

unless it is a Ford...then you are SOL and I wouldn't even waste my money on oil

Best post ever

[birddog]

Best post ever

Yea, cant beleive this one didnt start a huge debate. Funny.

[TRnCO]

I'm another fan of Rotella and even run it in my old 86 yamahoppie Venture.

[Zundfolge]

Just make sure when you change it you're wearing gloves ... used oil out of a diesel motor is carcinogenic (much more-so than oil from a gas engine).

[Tweety Bird]

What kind of lifters are in it? Modern oils aren't all friendly to flat lifters, though if it's a well-broken-in engine, it's not as critical.

Look for ZDDP on the web.

I run Rotella in my diesel tractor and it seems to be fine, though I haven't seen the internals of the engine, either.