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P.i. Performance Improver Gasoline Additive

Product code : CPICN-EA

4.9 star rating
Read 668 reviews
Read 668 reviews
See all customer reviews

  • Restores up to 14% horsepower1
  • Restores GDI fuel injectors to 100% flow rate after one tank of fuel2
  • 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 up to 14% horsepower1
  • Restores GDI fuel injectors to 100% flow rate after one tank of fuel2
  • 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.

Product Overview

P.i. Performance Improver Gasoline Additive



AMSOIL P.i. is a potent gasoline performance improver with concentrated detergent that aggressively cleans stubborn, power-robbing deposits from injectors, valves and the combustion chamber. Effective in port and direct injection systems. Bottle compatible with capless fuel systems. Cleans entire fuel system in one tank of gasoline. For use with cars and trucks. Treats up to 30 gallons. Add entire bottle to tank at fill-up. For best results, clean your fuel system with P.i. every 4,000 miles (6,400 km). Do not use with diesel, E85 or 2-stroke mixed fuel.

See the Product Data Bulletin for full details.

MAXIMUM DEPOSIT CLEAN-UP

  • Helps keep valves clean and moving freely.
  • Aggressive additives attack the most common forms of engine deposits and limit their effects.

REMOVES FUEL-INJECTOR DEPOSITS

  • P.i. removes 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

RESTORES HORSEPOWER

  • Third-party testing demonstrated performance of P.i. using a 2016 Chevrolet* Silverado* with 100,616 miles on the odometer.
  • Following a single treatment with P.i., the truck measured an incredible 14% improvement in horsepower.1

Horsepower Comparison

CLEANS COMBUSTION CHAMBER DEPOSITS

  • Fights combustion chamber deposits to help restore power, control knock, increase fuel economy and reduce the need for higher-octane fuels.
  • Protects against compression loss, difficulty starting and rough idling.
  • Reduces possibility of "carbon rap," when deposit buildup causes the piston to hit the cylinder head.
  • Decreases the possibility of pre-ignition "knock" or "pinging."

CAPLESS-COMPATIBLE BOTTLE

  • Bottle is fully 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.

See the Product Data Bulletin for full details.

Technical Specification

P.i. Performance Improver Gasoline Additive

Warranty

Data Bulletin

SDS



Product Reviews

P.i. Performance Improver Gasoline Additive

4.9 star rating
Based on 668 reviews
Based on 668 reviews
See all customer reviews
  • 5 star rating
    Highly recommend!!
    By  RICHARD,  a  Verified Buyer  from  Pittsburgh   on  September 19, 2023
    Had a high idle in my 1990 Mazda Miata that performance improver lowered after pouring this into my gas tank. I believe the engine is now running cleaner and stronger. Way better then store bought products like Lucus etc ..
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Tune up in a bottle
    By  JOE,  a  Verified Buyer  from  Jasper Georgia   on  September 16, 2023
    Fixed a mild skip in my 03 Silverado 5.3. I’ll be using this at every oil change and fuel filter replacement.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Noticed
    By  TIM,  a  Verified Buyer  from  Alabama  on  September 13, 2023
    I put this in a 2012 Mercedes GLK 350 that has 120,000 miles. We had loaned this vehicle to the father in law and it did a lot of sitting…often a couple weeks at a time between startups. We got the car back, added a bottle of this magic, and in no time the idle was smooth as new and the car wasn’t downshifting as much on the open road. This is the only time I’ve ever used a fuel additive and actually felt a difference.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Your syntheticzoli
    By  VICTOR,  a  Verified Buyer  from  Baker City , Oregon  on  September 09, 2023
    I have used your synthetic oil for years I just put the new synthetic oil for car with 100,000 miles. I have 2012FordFusion with a 3.0 l V-6 with 97,000 miles and I just put in this new oil and we shall how much the engine will like the new oil. It run like a top and know I will recommend this synthetic foil to any one that wants the engine much longer thanks for the best oil for all gasoline engines
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    prevention solution
    By  ROBERT,  a  Verified Buyer  from  Ontario, Canada  on  September 07, 2023
    I have always used PI as a preventative solution to combat combustion deposits and a fuel system cleaner. Must be working as I have not had a fuel issue in 15 years.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great
    By  SCOTT,  a  Verified Buyer  from  California   on  September 06, 2023
    Put it in a full tank and truck ran smooth idle smooth and just great results, highly recommend
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Improves performance
    By  RODGER,  a  Verified Buyer  from  Northern California   on  September 03, 2023
    I noticed the difference the first time I used it about a year ago. Give my engine better performance.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Performance improver
    By  MATTHEW,  a  Verified Buyer  from  North Carolina   on  September 02, 2023
    Truck runs better increased mileage great product.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Excellent product
    By  GREG,  a  Verified Buyer  from  Florida   on  August 30, 2023
    Great feel additive using all my cars
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    The best gas additive there is
    By  BILL,  a  Verified Buyer  from  Yakima  on  August 29, 2023
    I am glad Amsoil has this additive for the gas, Performance Improver is exactly what it does, hands down.
    Bottom Line
    Yes, I would recommend this to a friend.
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