I tried searching but couldn't find any info I am currently running Royal Purple 15/40 diesel, I have heard stories and would like to get everyones pros and cons on the oil I am using. Should I switch ????? What are you running

 

Rotella 15w40, WIX filter.

 

I mostly run ROTELLA 15-40, but when DELO 15-40 or DELVAC 15-40 are on sale, i'll buy either one

 

Rotella X 3

 

Rotella x4- I use a Mobile 1 oil filter. I change every 6k- I do not haul anything but a bass boat on weekends!

 

Usually Delo 15-40 but any diesel rated 15-40 on sale will work.
Costco's usually got Delo on sale.