Mobil 1 High Mileage full synthetic motor oil 5W-30 is designed for engines with over 75,000 miles to help reduce oil leaks with a boosted level of seal conditioner and extend engine life for high mileage vehicles of all ages better than conventional oil. 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 synthetic motor oil is recommended for all types of modern vehicles, including high-performance, turbocharged, supercharged gasoline, and diesel multivalve fuel injected engines found in passenger cars, SUVs, light vans and light trucks. Available in 1-qt. and 5-qt. bottles, Mobil 1 High Mileage full synthetic motor oil 5W-30 also helps control oxidation to prevent oil breakdown. Mobil 1 is the world's leading synthetic motor oil brand, recommended by car builders and experienced mechanics, and is the Official Motor Oil of NASCAR�.