Oil for Duramax Diesel

[x33rs]

If it helps anyone considering....

I sign up every year as a preferred customer for $25 and get the preferred pricing. I buy in bulk for all the cars to save a little more and usually wait until they have a free shipping offer too.

Even with the membership fee, and any tax added, it still ends up cheaper per quart (by about $3 a quart) than what the stores get locally for it. It is available locally, our local Napa carries all Amsoil products so if I need something in a pinch I can get it. But I usually try to plan for the year and place one order.