Mobil 1 High Mileage full synthetic motor oil 5W-30 is designed to help extend engine life for high mileage engines of all ages with over 75,000 miles and contains a proprietary blend that protects 10,000 miles between oil changes. Mobil 1 High Mileage contains a seal conditioner to help reduce oil leaks in higher mileage vehicles, and its uniform synthetic oil molecules reduce friction, helping to prevent deposits and sludge buildup. This technologically advanced formulation provides excellent internal engine heat protection (up to 500 degrees Fahrenheit) and low-temperature capabilities (to -40 degrees Fahrenheit), supporting quick cold-weather starting and ultra-fast protection. Mobil 1 High Mileage meets ILSAC GF-6 standards to help provide low-speed re-ignition (LSPI), timing chain wear protection while keeping your engine clean and helping your full economy.