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P.i. Performance Improver Gasoline Additive

Product code : APICN-EA

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.

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.

Warning - Click here for Proposition 65 information for this product

P.i. Performance Improver Gasoline Additive



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.

See the Product Data Bulletin for full details.

REMOVES STUBBORN DEPOSITS TO RESTORE POWER AND PERFORMANCE

  • AMSOIL P.i. restores up to 14% horsepower in one tank of gasoline.1
Horsepower Comparison
  • 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

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.

*All trademarked names and images 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.

P.i. Performance Improver Gasoline Additive

G2543: A Study in Performance
Download the G2543: A Study in Performance


P.i. Performance Improver Gasoline Additive

  • 5
    This stuff works
    By  JOHN,  a  Verified Buyer  from  Florida   on  September 24, 2021

    Describe the issue

    I’ve used PI on everything that has a gas engine after lots of mikes I pull the injectors and inspect the cylinder bore and piston you would believe what regular use does for keeping them clean
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    It worked
    By  JACK,  a  Verified Buyer  on  September 23, 2021

    Describe the issue

    I was surprised that after Just 1 bottle it stopped the hesitation when starting out at slow speed. I now use a bottle about every 4 thousand miles.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    It works!
    By  JAMES,  a  Verified Buyer  from  NH  on  September 23, 2021

    Describe the issue

    Anytime my fuel injected, turbo Buick starts to idle a bit rough, I add one of these at the next fill up. Smooths it up, and I also notice a mpg increase.
  • 5
    Huge
    By  BENJAMIN,  a  Verified Buyer  from  Ventura   on  September 21, 2021

    Describe the issue

    Saw huge mpg improvements for the first co up 3k
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Best fuel additive
    By  MATT,  a  Verified Buyer  from  Berwyn,pa  on  September 19, 2021

    Describe the issue

    After I put this product in my car I noticed an improved throttle response.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    gas additive
    By  GARY,  a  Verified Buyer  on  September 16, 2021

    Describe the issue

    I tried other Amsoil products so why not this?
    Bottom Line
    Yes, I would recommend this to a friend.
  • 3
    I have questions
    By  SIR JIMMY,  a  Verified Buyer  from  Orrville  on  September 14, 2021

    Describe the issue

    I have run this gas treatment 2 times in my 2017 2500HD. I honestly have noticed no difference in motor out put, Horse Power or better MPG. I will try this in my Ford Ranger to see if there is any noticeable difference in the near future. If I could get my money back for the 2 bottles I purchased I would. This product might work for others but I was not impressed.
    Bottom Line
    No, I would not recommend this to a friend.
  • 5
    Runs smoother
    By  ARMANDO,  a  Verified Buyer  on  September 13, 2021

    Describe the issue

    After use one bottle in each vehicle I have noticed our engines running a little smoother. Very happy.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Works as advertised
    By  Vince G.,  a  Verified Buyer  from  Long Island City, NY  on  September 13, 2021

    Describe the issue

    I've used PI both as a maintenance product (every 4,000 miles) and as an emissions passer (annual NY state inspection). Works as advertised.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Really works
    By  Grant,  a  Verified Buyer  on  September 07, 2021

    Describe the issue

    Made a huge difference even after the first treatment.
    Bottom Line
    Yes, I would recommend this to a friend.