oil question

[05pwrstk]

Whats up fellas, im a first time diesel owner and i was wondering what oil weight is used in a 2005 f250. Thanks in advance

scott

[Evil Eye]

15W-40 (or 15W-30 up where its cold!) and make sure that it is specifically designed for diesel engines. A bunch of folks here, including me, are running Shell Rotella-T.

[lamarmathis]

its 15w40, or 5w40 rotella syn.

[dieseldan2005]

I'm running 5/40 rotella syn in my 7.3 now.

[Evil Eye]

Originally Posted by lamarmathis

its 15w40, or 5w40 rotella syn.

Thanks, man. I corrected my mistake.

[05pwrstk]

awsome thanks fellas, i have one more question i wanna increase my gas mileage and maybe get a little bit more hp what would be the best tuner.

[Lunk]

I run Amsoil 5W-30 Series 3000 100% Synthetic in my 03 6.0L. Works great.

[Evil Eye]

Originally Posted by 05pwrstk

awsome thanks fellas, i have one more question i wanna increase my gas mileage and maybe get a little bit more hp what would be the best tuner.

SCT with custom tunes, hands down! Talk to Innovative Diesel or DJ's. You won't be disappointed!

[Beatngu]

Amsoil 5w-40, the 5w is great on cold starts and the 40 is perfect at operating temps.
I know when I switch to Amsoil, the turbo would actually spin longer after I turned the truck off, I can only assume it's the better lubrication of the oil.