Castrol 03072 GTX MAGNATEC 10W-30 Motor Oil, 5 Quart Dramatically reduce engine wear Leave critical engine parts 4X smoother Add a layer of protection during warm-up and beyond Cling to critical engine parts when the oil drains down API SN; ILSAC GF-5; Meets the performance of GM 6094M Castrol recommends the use of Bosch oil filters