4 oz - Microlon Engine Treatment works by reducing friction inside of your engine and helps it to operate more efficiently. An engine that has been Microlon-treated will save you real dollars by reducing wear and tear, increasing fuel economy, and lowering maintenance costs. An engine that operates more efficiently will feel more powerful. Since Microlon's Engine Treatment is a one-time treatment, you can enjoy the benefits of a smoother, more powerful vehicle from a one-time investment. Use Microlon's Engine Treatment in all engines: 4-stroke, 2-stroke, diesel, automotive, recreational and commercial vehicles, marine vessels and heavy equipment including farming, industrial and construction.