The CRC Clean-R-Carb Carburetor Cleaner is the perfect solution for restoring your carburetor and choke to peak performance. This powerful cleaner quickly dissolves gum, sludge and varnish deposits that can build up on vents, links, butterflies and PCV systems. It is designed to improve fuel system performance and fuel economy and is harmless to oxygen sensors and catalytic converters. With a shelf life of ten years, this carburetor cleaner is the perfect choice for keeping your carburetor and choke running smoothly. FleetPride is your First Click in Heavy Duty®.