Amsoil 15w-40 with 9qts of makeup oil, 3 of those quarts were S3000 5w-30, used 3 Amsoil filters
97,000 miles on the truck, 30,000 miles and 2 years on the oil. Did not change oil
Truck has a Superchips programmer and K&N FIPK with outer wear.
Iron 95
Chromium 3
Lead 26
Copper 129
Tin 0...