Mobil 1 High Mileage oils are designed to help extend engine life and prevent engine oil leaks. To help prevent wear in higher mileage engines, this advanced, fully synthetic high mileage oil features:

• Higher base oil viscosity to help reduce leaks and provide better high temperature protection.
• Additional seal conditioners to protect engine seals in all vehicles because over time, rubber seals can harden or shrink, resulting in oil leaks.
• A proprietary blend of high-performance synthetic base oils

If your engine contains excessive sludge deposits due to less-than-adequate maintenance practices, Mobil 1 High Mileage synthetic motor oil can help reduce this sludge. For severe cases of engine sludge, short oil change intervals (3,000-5,000 miles) are recommended for the first two or three oil changes as the sludge reduction takes place. (In cases of engine damage that may have resulted from poor maintenance, even Mobil 1™ motor oil cannot remedy years of neglect.)