Description Mobil 1 full synthetic high mileage motor oil is specially designed for vehicles with over 75,000 miles that are upgrading from conventional motor oil or synthetic blend motor oil, and vehicles that require full synthetic motor oil. It outperforms conventional oil, helps extend engine life, and provides guaranteed protection that is 1.5 times longer (up to 7,500 miles between oil changes) than our conventional and synthetic blend oil. Mobil Full Synthetic High Mileage helps to prevent sludge, deposit formation and to help reduce engine wear, with a balanced additive system formulation and extra seal conditioner to help prevent leaks. It has excellent resistance to oil breakdown, providing proven long-lasting protection and maintaining oil viscosity at high operating temperatures. Recommended for all types of gasoline-powered vehicles, including those with turbocharged engines, found in passenger cars, SUVs, and light-duty vans and trucks.