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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
    Notice first use
    By  T.P.,  a  Verified Buyer  from  Cincinnati   on  January 21, 2021

    Describe the issue

    My 2008 toyota tacoma would sometimes hesitate when accelerating. Not anymore with just one use!
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Great
    By  QUENTIN,  a  Verified Buyer  from  KS  on  January 19, 2021

    Describe the issue

    When we add this about every 3rd tank my wife notices the fuel increase and power
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    By  RICHARD,  a  Verified Buyer  from  NY  on  January 18, 2021

    Describe the issue

    EXCELLENT CLEANER
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Instant improvement in throttle response
    By  JUSTIN,  a  Verified Buyer  from  Southern Illinois  on  January 18, 2021

    Describe the issue

    Excellent product! I can tell an instant difference in throttle response. I personally do not see an improvement in MPG, however my friends do. Driving a 2500 with oversize tires I’ve pretty much given up on improved fuel economy.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    By  BRYCE,  a  Verified Buyer  on  January 18, 2021

    Describe the issue

    Bottom Line
    Yes, I would recommend this to a friend.
  • 4
    OK
    By  HUBERT,  a  Verified Buyer  from  Thomaston Ga.  on  January 18, 2021

    Describe the issue

    Never really notice an increase in mileage but it does help if get bad gas and with emissions. Get this for every 4000 miles
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Improved power and milage.
    By  CHAD,  a  Verified Buyer  from  Kentucky   on  January 18, 2021

    Describe the issue

    This product does EXACTLY what's printed on the label! I gained at least 60 more miles to a tank of fuel and the engine is more efficient and responsive. Great product! Awesome job Amsoil!
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    By  CECILIO,  a  Verified Buyer  on  January 18, 2021

    Describe the issue

    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    By  CURTIS,  a  Verified Buyer  from  Abilene, TX  on  January 18, 2021

    Describe the issue

    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Don't Leave Home Without It!
    By  Martyman,  a  Verified Buyer  from  Eau Claire, WI  on  January 08, 2021

    Describe the issue

    I feed this stuff to my new truck, my wife's 80k mile truck and my sister's 150k+ SUV. The latter two love it (don't notice much but a slight bump in MPG in my new truck). It definitely helps the higher mileage vehicles...I wouldn't think about using anything else; it's that good!