MotorKote Catalytic and Exhaust Treatment Emissions Control 16-Ounce is formulated to protect and treat the Catalytic Converter and Exhaust System from oil poisons. This will aid in reducing the carbon footprint of your vehicle and improving overall performance; helping to increase fuel efficiency, and protect your converter. Recommended Usage: Add full bottle into 16 gallons of fuel or 1 ounce per gallon. Last up to 6 months or 7,000 miles which ever comes first. This gasoline additive is safe for use in all gasoline engines, all catalytic converters and oxygen sensors, when used as directed. Helps pass emissions test.