New! Capless gas tank compatible. Performance Additives. Stops knocks & pings. Maximizes performance. Helps Protect Your Fuel System: Maximize performance, stops knocks & pings, boost octane rating. Using poor quality gas or a lower octane rating than required by your vehicle manufacturer can lead to lost fuel economy, poor combustion, knocks and pings and power loss. For technical questions or comments, call 1-855-888-1990. www.gumout.com. Made in the USA of foreign and US components.