Mobil-1 Syntheric oil is made is 4 weights: 0W-30 0W-40 (not commonly available in the U.S.) 5W-30 10W-30 15W-50 Here is some information to help you decide which one to use. Warranty: The Owner\’s Manual tells what oil Chevrolet wants you to use, and ignoring their specs COULD result in engine damage. Worse, it COULD […] More »