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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
    Great quality for the cost!
    By  EDWARD,  a  Verified Buyer  from  Phoenix AZ  on  December 03, 2021

    Describe the issue

    PI (Performance improver, is among the best, if not the best gasoline additive for the valves and piston heads!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Great
    By  HECTOR,  a  Verified Buyer  on  December 02, 2021

    Describe the issue

    Awesome make a big difference
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Works well!
    By  PHILIP,  a  Verified Buyer  from  Kansas   on  December 02, 2021

    Describe the issue

    Definitely offsets what the government considers gas these days! Boost in fuel mileage and smoother running!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Great product
    By  JJ,  a  Verified Buyer  from  Pennsylvania  on  November 25, 2021

    Describe the issue

    Great product
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Works great!
    By  Derrick,  a  Verified Buyer  from  Kansas  on  November 21, 2021

    Describe the issue

    Works great! Cleans fuel system very well
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    preformance improver
    By  DENNIS,  a  Verified Buyer  on  November 20, 2021

    Describe the issue

    I noticed my Mazda cx7 had more pep and smoother running after just the first treatment. As a bonus my fuel mileage also increase.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    I feel a more powerful motor
    By  NESTOR,  a  Verified Buyer  from  California  on  November 18, 2021

    Describe the issue

    It seems to help and gives me more mpg
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Works as expected
    By  RAY,  a  Verified Buyer  from  Minnesota   on  November 16, 2021

    Describe the issue

    Works and provides results. Helped my trucks and many other vehicles I own get better performance and definitely helps clean my fuel system.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Easy to use
    By  MARTIN,  a  Verified Buyer  from  Dublin, OH  on  November 15, 2021

    Describe the issue

    Jury is out on whether this product is effective. I add a bottle when I change the oil in our cars each year, and we generally only put about 5-6k miles on our cars each year, so it's close to the recommended 4k miles. Been using this product for about two years and all the cars run well, so that's a good sign.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Love it
    By  LARRY,  a  Verified Buyer  from  Saskatoon, Saskatchewan  on  November 10, 2021

    Describe the issue

    I have used this product a long time and I feel it works great
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?