STP Gas Treatment improves the quality of your gasoline by adding powerful cleaning agents designed to combat the buildup of harmful carbon, gum, and varnish deposits in your fuel system. These deposits can reduce engine performance, but with regular use, this treatment helps keep your fuel intake system clean, boosting overall efficiency and saving gas. It also fights fuel line ze by removing water, ensuring your engine runs smoothly in various conditions. Made with jet fuel, which acts as a high carrier of active ingredients, this product is safe for all gasoline engines. For results, use STP Gas Treatment regularly each time you fill up. The concentrated formula comes in a 5.25 fl. oz. bottle and treats up to 21 gallons of fuel. Model Number: 18039G