Amsoil's Engine and Transmission Flush is a detergent-based flush product formulated to improve fuel economy, operating efficiency and reduce emissions in gasoline and diesel engines, and in automatic transmissions. Its has a potent formula that cleans sludge and deposit build-up, promoting lower operating temperatures and reduced oil consumption. Amsoil says the product is safe on parts and can be easily disposed of with waste oil. In addition, the product loosens sticky valves, helping quiet lifter noise. In transmissions this flush product helps unclog fluid passages, improves erratic shifting and promotes smoother operation and longer transmission life.