Step 1 clean. Removes tough grease & oil build-up. For hardworking, leaky engines. Clean engines run cooler, look better & last longer! Gunk Original degreasing formula for cars, trucks, power mowers, marine, heavy-duty rigs, farm equipment and tractors as well as industrial machinery. Clean your engine with Gunk Original and then protect it with Gunk shine. Step 1: Foamy, cleans dirt & road grime or original, removes tough grease & oil build-up or heavy duty gel, eliminates baked on grease & engine deposits + Step 2: Shine, protects against dirt & grease. Choose your level of clean + shine. www.gunk.com. No CFCs: Contains no CFCs which deplete the ozone layer. Made in USA.