Klotz Nitro Power Fuel Additive With Koolinal Klotz Nitro Power Fuel Additive is a high-performance oxygenating power booster that combines 50 nitropropane and 50 Koolinal. This innovative blend promises to enhance your machine's horsepower, torque, and throttle response while minimizing the risk of detonation and pre-ignition. Suitable for both two- and four-stroke engines, it demands careful adjustment of jet sizing, timing, and spark plug heat ranges to harness its full power potential efficiently. Features: Formulated as an oxygenating power additive 16 ounces treats 4 to 8 gallons of fuel Contains: 50 nitropropane as a power adder 50 Koolinal as a blending and cooling agent Koolinal resists detonation and pre-ignition Increases horsepower and torque Improves throttle response and acceleration Not for sale or use in the state of California Specifications: Blends with pump gasoline, E85 or methanol A colder spark plug heat range is recommended 4-stroke engines: Use 3 to 4 ounces of Nitro Power per gallon to start, jet sizing may need to be increased up to 4 sizes High compression engines might require timing adjustments Ratios up to 12 ounces per gallon can be used with proper jetting Heat constraints must be verified 2-stroke engines: Use 2 to 4 ounces of Nitro per gallon to start Jet sizing may need to be increased up to 6 sizes Higher ratios can be used but jetting and plug heat range must be checked Note : Take several spark plug readings to verify jet settings and correct spark plug heat range. Timing adjustments may be required. Continue to test and use at own risk.