i was running rotella, switched over to kendal 2 changes ago.

 

I use the DIC, i figure it knows more about whats going on than i do, seems to work just fine

 

I went by the puter on my gas job but that was a lease truck so I didn't really care.

 

I use castrol diesel oil 15-40 and change mine every 5000 miles. I used to work for an out-fit that had construction workers driving, used castrol and changed every 5000 would consistently get well over 250000 on all their gas heavy duty trucks. I figure my diesel should go well past that.