I work at a independant auto shop. We do not work on diesels very much at all.. I jsut bought a 03 2500hd crew cab with the lb7 in it.. I am able to buy these oils at a discounted price through my shop. please rate them in order and any comments would be great too.

1. red line synthetic

2. lubro molly synthetic

3. pentosynth (OE for BMW)

these are available for my gear oil too, so let me know aht you think, I know alot of you run the delvac1. any suggestions ? they all came up on my mitchel on computer at work for the 03 2500 duramax application..

Also, when changing my fuel filter, what do i prime the fuel filter with? some have said wd40??? please advise

i would like to know too . bump .

bump it

Do any of them carry the Ci-4 rating?

Never heard of the second two..