104+ a powerful synthetic cleaner that helps to improve acceleration; clean fuel injectors and the entire fuel system. It helps to restore lost engine horsepower with 1 use. Helps to reduce knocks, pings, hesitation, and stalling. Improves gas mileage. Not harmful to spark plugs, catalytic converters, and OBD oxygen sensor systems. Add 1 oz. to every gallon of gasoline. 16 oz. bottle. WARNING: Cancer and Reproductive Harm - For E-Commerce Sales: This product can expose you to chemicals including Naphthalene (CAS# 91-20-3) and Benzene (CAS# 100-41-4 )which are known to the State of California to cause cancer and Benzene (CAS# 71-43-2) w -