Factory Motor Parts' FVP Stay Tuned multi-system additive has more active ingredients than other leading brands and performs in gasoline, ethanol, diesel, or oil. It works in all on-road, off-road, marine, and lawn & garden applications. It's independently lab-tested and contains a robust fuel additive package its major competitor does not. It improves gasoline fuel economy, keeps engines clean, stabilizes fuel, provides lubrication, and minimizes sludge, gum, and varnish. It's available in 16 oz. and 1 gal. containers.