This product is designed for motorcycles, however works incredibly well on automotive engines, specifically the aluminum parts, such as carburators, fuel ingection systems, valve covers, any non-coated aluminum parts. Brings the finish back to life looking new again. When S100 Total Cycle Cleaner reached the USA in 1985, it was hailed as a completely new technology for cleaning motorcycles. Replacing petroleum solvent cleaners with a water-based, environmentally friendly formula, bikers were surprised that, for the first time, all parts of a filthy bike could be cleaned in a matter of minutes. Rider Magazine hailed it as a revolution for the Saturday morning wash. Cycle Magazine said...nothing we have tried cuts through road grime quicker or more thoroughly. Bikers all across the country are riding far longer thanks to the time S100 saves in bike cleaning. Simply spray S100 Total Cycle Cleaner over a dirty bike and hose off! Dirt, grease and insects melt away with little or no scrubbing. Made in Germany, S100 Total Cycle Cleaner is factory approved by many of the world?s leading motorcycle manufacturers. 1000 ml refill bottle