| Hi BadBrad, I have the same truck as you. Love it!
I wanted to go synthetic and did a lot of research on the different oils out there. Bottom line was that the only sysnthetic in a 15W40 was AMSOIL and I just didn't want to go that way.
I remembered that in the trucks we used to run the Rotella T and would consistantly get a million miles or better before overhaul. That's what I wound up getting.
One other note. I bought mine back in September. As we all know, GM is bleeding and hurting. They almost doubled the price of the fuel filters overnight in October. I went to Advance Auto and ordered six of them at $24.00 each instead of the almost $50.00 GM wanted at the dealership. And they are A/C filters.
Went to NAPA and got the spin on transmission filter for almost half what GM jacked it up to.
For what it's worth!
Jack Hart |