That is waht I use, Rotella 15W40. I think people started using it when the non diesel motor oil had most of the zinc removed. I have seen posts that indicate the diesel oil has gone the same way.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!