what kind of oil
 

I have a 94 7.3 Idi motor what is the best oil to use

15/40 shell rottella:c:

I've used ROTELLA, DEL-VAC, DELO, & MOTORCRAFT. All were good & I haven't had any engine problems in any of my diesel trucks

Rotella!:jump:

I run delo 400le 10 in my semi and my 04 6.0 never had any problems

Shell rotella, not that expensive but works the job well.

i use rotella

Rotella 5w-40 syn.

synthetic rotella, my truck picked up mileage and definitely runs smoother and quieter :c: