AMSOIL Engine and Transmission Flush helps restore fuel economy, increase operating efficiency and reduce emissions in gasoline and diesel engines, and automatic transmissions. Its potent, detergent-based formula cleans sludge and deposit build-up, promoting reduced oil consumption. AMSOIL Engine and Transmission Flush is safe on parts and can be easily disposed of with waste oil. Restores your vehicle to like-new! a must-buy for those who demand longer engine & transmission life.