This unique formula is recommended for use in all four-cycle engines (gasoline and diesel) with either synthetic or petroleum based motor oils. MPT Engine Treatment clings to internal engine parts thus reducing friction and wear. Need proof? View the MPT Engine Treatment coefficient of friction test results and MPT Engine Treatment versus competitors - comparison test results to see for yourself. MPT Engine Treatment`s PTFE particles are so small they easily flow through an oil filter and engine without ever being trapped. The formula with regular use will significantly extend engine life. Smoother and quieter operation will result in increased efficiency for better fuel mileage easier starting more power and better performance. Use MPT Engine Treatment at every oil change. Add two ounces per quart of motor oil for the initial treatment. Subsequent treatments require a minimum of one ounce per quart of motor oil. MPT Engine Treatment will not void new car warranties.