ACDelco Fuel System Treatment Plus cleans the entire fuel system and restores lost power and performance caused by carbon deposit build-up. It can be used in passenger cars and light duty trucks with gasoline engines. This fuel system cleaner helps clean sulfur corrosion and provides a real defense against harmful sulfur contamination in the fuel. Regular use of this treatment can also prevent fuel gauge malfunction caused by the sulfur components that are found in some gasolines. ACDelco Fuel System Treatment Plus provides protection that has been shown to last for thousands of miles. One ounce of this product will treat one gallon of fuel.