MOBIL 1 FS X2 5W50 (Mobil 1 5W50) is an advanced full synthetic engine oil designed to help provide exceptional wear protection for a smooth driving experience. MOBIL 1 FS X2 5W50 (Mobil 1 5W50) meets or exceeds the requirements of the industry and car manufacturers’ standards required for high-performance turbo-charged, supercharged gasoline and diesel multi-valve fuel injected engines. MOBIL 1 FS X2 5W50 is a winning, race-proven technology. It is especially suited for a wide variety of motorsports applications, towing, and other severe service situations. MOBIL 1 FS X2 5W50 helps to provide outstanding engine oil performance and protection for the winning edge. Mobil 1 is the official motor oil of NASCAR.