This 15-ounce fuel system cleaner delivers a powerful combination of detergents and synthetic lubricants to cleanse and protect fuel injectors, carburetors, valves, and combustion chambers. It supports all fuel injector types, including direct-injection systems, while enhancing fuel stability and preventing gum and varnish buildup. One treatment offers near-complete cleaning in a single tank, and can reduce octane requirements by up to two points. The formula also aids upper-cylinder lubrication and keeps emissions components clean—making it safe for continued use with oxygenated fuels.