Walmart used to carry the Accel 10W-40 SF-rated oil, but dropped it. I now run 15w-40 Chevron Delo from Walmart, which is cheap and has the good additives (or as much as I care to think I need).
I refuse to pay 8.99/quart for a 'racing oil' for my truck, but that's because I'm cheap.
I refuse to pay 8.99/quart for a 'racing oil' for my truck, but that's because I'm cheap.