P.i. Performance Improver Gasoline Additive API

February 12, 2021
  • Restores up to 14% horsepower1
  • Reduces need for costly higher-octane fuel
  • Reduces noise from carbon rap and pre-ignition
  • Controls pre-ignition "knock"

1Based on third-party testing in a 2016 Chevrolet* Silverado* 1500, 5.3L V-8 GDI with 100,616 miles, using one tank treated with AMSOIL P.i. Actual results may vary.

Data Bulletin and Field Study

Removes Stubborn Deposits to Restore Power and Performance

  • AMSOIL P.i. restores up to 14% horsepower in one tank of gasoline.1
  • Fights intake valve and combustion chamber deposits which helps restore power, control knock and reduce the need for higher-octane fuels.
  • Restores GDI fuel injectors up to a 100 percent flow rate.2
Horsepower comparison before and after Amsoil Performance Improver was added to the fuel.
Concentrated detergent aggressively cleans stubborn, power-robbing deposits from injectors, valves and the combustion chamber. Reduces emissions. Effective in port and direct injection systems. Bottle compatible with capless fuel systems. Cleans entire fuel system in one tank of gasoline.

1Based on third-party testing in a 2016 Chevrolet* Silverado* 1500, 5.3L V-8 GDI with 100,616 miles, using one tank treated with AMSOIL P.i. Actual results may vary.

2ASTM D5598(M) – 2013 Buick Regal test vehicle.

Amsoil P.i. Performance Improver Gasoline Additive API Buy Now/Pricing Information

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