Bars Leaks High Mileage Engine Repair contains a combination of the best performance additives to repair the most common oil-related problems.  Engine Repair restores lost compression and power, reduces noise and oil consumption, while improving the performance of worn cylinders, rings, bearings, and seals.  For most vehicles, this is your last chance before paying an expensive repair bill or replacing the vehicle.  Engine Repair can be used to top off the existing oil when low, or add a bottle when changing the oil and filter.  Compatible with ALL types of engine oils, including petroleum, semi-synthetic, synthetic and high-mileage formulas. vehicle_type- Universal