02sunsetorangeZ

iTrader: (1)

Yes, me too. 1 more question. I run amsoil in my car and was gonna switch my truck just because. They don't make the 10w40 in their signature series, they make a 10w30 with it. Should I run the 10w30 sig series or the 10w40 xl?

kinglt-1

iTrader: (26)

Valvoline synpower euro formula 10-40

mchicia1

iTrader: (5)

I like Rotella T6 5w-40 synthetic. I don't think it really matters, tbh. Most of us cammed guys don't blow motors because of oil .

MuhThugga

Run the Amsoil 10W-30 Z-Rod.

If your truck has AFM lifters, you shouldn't stray from 5w-30. The AFM lifters can really be finicky with oil weight.

02sunsetorangeZ

iTrader: (1)

No afm lifters, all ls7, btr cam, ls3 valley cover, ls2 timing cover. Deleted AFM/DOD and VVT. I prefer amsoil just because it is one of the best oils and i can get it the same price pretty much than off the shelf and i get it delivered to my door.