Back

Close Icon

Main Menu

Your order may take longer than normal to arrive. We are experiencing extremely high demand and freight carriers are experiencing delays nationwide.

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
    Would recommend
    By  RONALD,  a  Verified Buyer  from  Canada  on  April 29, 2021

    Describe the issue

    I use this before very oil change just to keep things cleaned up in the fuel system...works great would recommend as I would for all there products...you want the best then use the best amsoil...
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Old trick
    By  eric,  a  Verified Buyer  from  Vermont  on  April 29, 2021

    Describe the issue

    So I have been cheating and using amsoil 100/1 outboard oil to do the same thing for years. It reduced oil consumption in 2 honda cr-v's and the mileage is up slightly in all our vehicles. Great product
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    It lives up to the Amsoil reputation
    By  Jb,  a  Verified Buyer  from  Beaverdam, VA  on  April 26, 2021

    Describe the issue

    Poured the bottle in and no more hesitation in the throttle. Took the truck through the mountains of West Virginia and Kentucky and it never struggled to maintain speed. So far, I'm a believer!
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Keep that engine clean!
    By  BILLY,  a  Verified Buyer  from  Va  on  April 25, 2021

    Describe the issue

    This is another quality I am is all your product that you should use his part of your maintenance on your vehicle! You will notice a performance increase not only in power but gas mileage is well!
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Amsoil P. i. Performance Improver Gasoline Additive
    By  THOMAS,  a  Verified Buyer  from  32034 United states of America  on  April 23, 2021

    Describe the issue

    I used this product in a 01 Toyota 4runner limited with 87k miles. I have never used an additive before in this vehicle. After going thru a tank of gas I can happily say that I noticed a big difference in acceleration. I would recommend this product.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Great product
    By  MARIO,  a  Verified Buyer  on  April 21, 2021

    Describe the issue

    Good product this with new oil and filter have got my vehicles running smooth.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Improved gas mileage & performance
    By  Lirpa,  a  Verified Buyer  on  April 18, 2021

    Describe the issue

    Improved gas mileage and performance. Will use regularly from now on.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Faster startup
    By  CHAD,  a  Verified Buyer  from  Kentucky   on  April 17, 2021

    Describe the issue

    I've been using this for over a year now. It has improved the way my truck runs and starts. My truck is 21 years old and since using this, it starts right up and has quicker and more crisp throttle response. It brought new life to an older engine. I highly recommend using this product if you have an older engine. I'm positive it would keep a new engine running at peak performance as well.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Truly works
    By  JSimont,  a  Verified Buyer  from  Rockville, IN  on  April 16, 2021

    Describe the issue

    PI had been a product we’ve been careful to keep on our shelf. We believe it makes a big difference in the performance of our vehicles. We don’t use it on every fill up but usually every 3. May not need it but the engine seems to run smoother with it. Would I recommend this...absolutely.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Effective Gasoline Additive
    By  MO,  a  Verified Buyer  from  Orange County CA  on  April 16, 2021

    Describe the issue

    Effective gasoline additive that smoothed acceleration. Good product.
    Bottom Line
    Yes, I would recommend this to a friend.