Chevron Techron Fuel System Cleaner is unbeatable in cleaning the entire fuel system and restoring lost power and performance caused by deposit build-up. Cleans deposits from fuel injectors, carburetors, ports, valves and combustion chambers. Works in one tankful while you drive to reduce deposit related engine knock, ping, run-on, and cold start problems. Recommended for use every 3,000 miles. 20 oz. bottle. According to Motor Trend Magazine: If the loss of power and performance is due to combustion chamber deposits buildup the current state of the art treatment is an additive called polyether amine (PEA). Developed by Chevron and originally introduced in 1980, today it carries the company trade name TECHRON.