Official motor oil of Michael Waltrip Racing. API service SN. Prevents thermal breakdown. Reduces friction & wear. Helps prevent deposits & sludge. Performance without Compromise: At Peak, we're the independent guys, running a family owned business that's nothing like Big Oil. Here, American made quality and value go into good, honest oil, with everything your engine needs to run right for the long haul. For Consumer Information Call: 1-800-289-7234. Exceeds US and import car and light truck warranty requirements for all automotive gasoline engines currently in use where a SAE 20W-50 that meets API SN or previous API Standards is specified. API Service SN. Visit www.peakauto.com. Made in USA.