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


P.i. Performance Improver Gasoline Additive

  • 5
    Excellent fuel cleaner
    By  DAVE,  a  Verified Buyer  from  Wilmington Delaware  on  January 20, 2022

    Describe the issue

    Excellent fuel cleaner, had a friend on a Honda civic that had a catalytic converter code.. after two treatments of this fuel additive cat code disappeared and has not come back on most shops probably wouldn’t replace the catalytic converter for efficiency. Even said his gas mileage is better. Highly recommend this additive for your fuel system!!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    used instead of Techron
    By  MIKE,  a  Verified Buyer  from  Austin  on  January 19, 2022

    Describe the issue

    Hard to determine improvement as with most if not all addatives
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Best
    By  DaveP,  a  Verified Buyer  from  Orlando  on  January 16, 2022

    Describe the issue

    I've never had any fluel injectors problems in using this product for 20 years and at least 8 cars.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    The P.I. does it work?
    By  JAMES,  a  Verified Buyer  from  Colorado   on  January 14, 2022

    Describe the issue

    I have a Huge Tundra 2008 with 37" tires and my gas mileage is bad--So I started to use this P.I. and my mileage started out at 9.9 mpg---after using P.I.--now it's up to 11.2 and I'm always trying things to help this motor-- So I would say it works
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Better gas mileage
    By  KRIS,  a  Verified Buyer  on  January 09, 2022

    Describe the issue

    I have a 02 Dakota that never got good gas mileage it would always very one week I’d get 8-12 mpg currently getting 14 -17mpg Might also helped that I replaced my transmission but either way noticed an improvement using the Pi.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Good additive
    By  HENRY,  a  Verified Buyer  from  Tx  on  January 08, 2022

    Describe the issue

    Use as directed keeps injectors clean
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 1
    2017 GTI
    By  JOHNNY,  a  Verified Buyer  from  Vermont   on  January 08, 2022

    Describe the issue

    Noticed no difference
    Bottom Line
    No, I would not recommend this to a friend.
    Was this review helpful?
  • 5
    P.I. in a 2003 Ford Focus
    By  TOM,  a  Verified Buyer  from  Tacoma WA  on  January 06, 2022

    Describe the issue

    I had a 2003 Ford Focus that got 25mpg going back & forth to work. With the fuel tank just overt ½ full I put a full bottle of P.I. in the tank and ran it to almost totally empty. After that the car got 31- 32 mpg back & forth the 35 miles round trip to work. The P.I. cleaned out the fuel system and the car was more fuel efficient afterwords!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Good Performance
    By  CHRIS A.,  a  Verified Buyer  from  Indiana  on  January 04, 2022

    Describe the issue

    Have been using this product in all my gas powered vehicle for years. Have never had any starting or mileage issues. No indication of valve problems. Highly recommend.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    My go to fuel system cleaner
    By  MATT,  a  Verified Buyer  from  Oregon  on  January 03, 2022

    Describe the issue

    Works very well and improves gas millage
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?