Mobil 1 High Mileage synthetic oils are especially recommended for high mileage vehicles even those that have used lower quality conventional oils. (see Note 1)
Note 1 -- If your engine has excessive sludge deposits due to less-than-adequate maintenance practices, Mobil 1 High Mileage can help by reducing the sludge left behind in your engine. For severe cases of sludge, short oil change intervals (3,000 - 5,000 miles) are recommended for the first two-three oil changes as reduction of the sludge takes place. In cases of engine damage that may have resulted from poor maintenance, even Mobil 1 cannot remedy years of neglect.Oil Change Intervals
: Oil change intervals can be as short as 3,000 miles or as long 15,000 miles on some new cars. We recommend that you follow the oil and filter change frequencies shown in your owner's manual. With the high-performance reserves of Mobil 1 synthetic motor oil, you can have the confidence to go the full mileage or time frame recommended by the vehicle manufacturer. Mobil 1 synthetic oil is especially suitable for the latest vehicles with extended drain intervals or vehicles with oil monitoring systems that vary oil drain intervals.
For more information, see the Mobil 1 High Mileage 5W-20 Product Data Sheet
or find a Material Safety Data Sheet