Home Forums Gear Hunting Trucks and Four-Wheel Drives Synthetic or conventional oil?

Maybe you'll have better luck than me finding some results. But it was mentioned in a Q&A section reply from Mobil and it did give me pause.

A pretty good write up on lubes for turbo diesel trucks:

http://www.turbodieselregister.com/TDR57_Oil.pdf

I coulda sworn I'd come across another study of Mobil 1 5-40 turbo diesel, but my google fu must be week.

Thanks,next oil change ,I'll have a list.

four vehicles all on Mobil one, 6000 mile interval on the gassers, 7500 mile interval on the duramax(5w40 turbo diesel). I used oil analysis on these engines and was well within spec. Blackstone recommended longer interval, but i'm happy with what I use.

I have always used synthetic Rotella 15-40 wt for my 7.3 power stroke.I change the oil and filter,religously every 5,000 miles.