Unclogs dirty fuel injectors! Treats up to 21 gallons. Restores Lost Power and Helps: Save gas (Helps save gas and lower emissions by cleaning dirty fuel injectors); restore performance; remove deposits. Cap-less compatible. Use at every oil change or 4,000 miles. Safe for use in any gasoline engine. Advanced Cleaning Technology: Helps save gas and lower emissions by cleaning dirty fuel injectors. Helps restore power and acceleration. Helps smooth rough idle and eliminate tough starts. Jet Fuel: High-quality carrier of active ingredients. 100% satisfaction guaranteed or your money back. Questions or Comments? 1-888-GO4-STP1 in the USA. www.stp.com. Made in USA.