MOTUL CAT CONVERTER CLEANER is a cleaner additive designed to be used in all types of Gasoline engine catalytic converters, oxidation catalysts and TWC - Three Way Catalytic converters.MOTUL CAT CONVERTER CLEANER cleans the entire fuel systems, dissolves resins, gums and carbon deposits on Lambda probes and catalytic converter honeycombs.Mixed with the gasoline fuel, MOTUL CAT CONVERTER CLEANER provides:• Faster and more efficient cleaning of the catalytic converter and oxygen sensors• Restores original engine power and performance.