3M™ Complete Fuel System Cleaner, 08813 is a high-quality fuel tank additive that effectively cleans fuel injectors, intake valves, and combustion chambers, removing carbon, gum, resin and varnish deposits to help improve fuel economy and restore power. Designed only for gasoline engines, 3M™ Complete Fuel System Cleaner helps improve overall engine performance and helps reduce the risk of poor fuel economy, rough idling, hesitation and stalling.