Originally Posted By: pb379
Any thoughts on why Mobil Delvac 1 is so much more expensive than Rotella T6 and Chevron DELO LE ?
There is the comment about better base oil. Additionally, here, the situation is reversed. Delvac 1 ESP 5w-40 is a bit cheaper than the competition, and Delvac 1 LE 5w-30 is a bit cheaper yet. That is comparing distributors. The retail pricing is, of course, usually atrocious no matter what you choose. Chevron stuff is usually fairly cheap from trucking outfits here.
Mobil Delvac 1 ESP 5w-40 is a CJ-4, E7, E9 lubricant, whereas Delvac 1 LE 5w-30 is a CJ-4, E6, E7, E9 lubricant, with lower phosphorus.