Treats up to 35 gal. Fights injector & pump wear. Use every fill-up! Larger size for SUVs and trucks. Use regularly when you fill up. STP Diesel Fuel Injector Treatment Helps: save fuel by keeping injectors clean; maintain performance by preventing deposit buildup, corrosion and rust; fight fuel line freeze and wax gel formation; fight injector and pump wear by improving the lubricity of diesel fuel. Formulated to help prevent deposit buildup and corrosion in diesel engines. Without cleaning, deposits can harm performance and waste fuel. Contains no alcohol. 100% satisfaction guaranteed or your money back. STP does not manufacture any private label products. Questions or comments? 1-888-GO4STP1 in the USA. www.stp.com. Made in USA.