P.i. Performance Improver Gasoline Additive

AMSOIL P.i. Performance Improver Gasoline Additive is a potent, deep-cleaning gasoline performance improver, featuring concentrated detergents that aggressively clean stubborn, power-robbing deposits from injectors, valves and combustion chambers. P.i. cleans your entire fuel system and restores up to 14% horsepower1 in one tank of gasoline. The P.i. bottle is fully compatible with the capless fuel systems of modern vehicles for easy application.

Maximum Deposit Clean-Up

AMSOIL P.i. features aggressive additives that attack the most common forms of engine deposits and limit their effects.

Removes Fuel Injector Deposits

Most new engines feature gasoline direct-injection (GDI) to boost power and improve fuel economy. These injectors are located inside the intense heat and pressure environment of the combustion chamber, making them particularly vulnerable to deposits. Extreme pressure combined with incomplete fuel combustion can lead to dramatically increased soot (particulate matter) levels. Direct injection typically creates 30 to 40 times more soot than port fuel injectors (PFI). Even a minimal amount of injector fouling can lead to increased pollution and wear and decreased power and fuel economy.

Injector deposits:

  • Decrease efficiency, power and fuel economy
  • Increase exhaust emissions
  • Contribute to poor starting and rough idle
P.i. removes stubborn deposits and keeps injectors functioning as they should. Testing shows P.i. restored GDI fuel injectors to a 100% flow rate after one tank of fuel.2
P.i. Performance Improver Gasoline Additive APICN scaled
P.i. Performance Improver Gasoline Additive
  • Restores up to 14% horsepower
  • Restores GDI fuel injectors to 100% flow rate after one tank of fuel
  • Improves fuel economy
  • Reduces need for costly higher-octane fuel
  • Helps prevent carbon rap
  • Controls pre-ignition knock
  • Compatible with capless fuel systems

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.


Restores Horsepower

We set out to once again demonstrate the superior performance of P.i. through third-party testing using a purchased 2016 Chevrolet Silverado with 100,616 miles on the odometer. Prior to testing, the truck was run on a chassis dyno and measured for HP. The 5.3L GDI engine was then disassembled, photographed and reassembled. Following a single tank of of fuel treated with P.i. driving at highway speeds, the truck was again strapped to the dyno. It measured an incredible 14% improvement in horsepower. The engine was then disassembled once again to see the impact P.i. had on deposits. The images to the right demonstrate the powerful cleaning performance of P.i on injectors and cylinder heads to significantly restore power and efficiency.

P.i. Performance Improver Gasoline Additive

*All trademarked names are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.

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