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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 regular maintenece item
    By  JAKE,  a  Verified Buyer  on  July 26, 2021

    Describe the issue

    Use it in my tuned 2018 540i 450+HP 500+ tq. I run higher octane fuel 90% of the time, or an ethanol blend so every couple of tanks I run normal 93 octane and a bottle of this and the Upper cylinder lubricant. Keeps things running smoothly and clean. I use all Amsoil fluid in all my vehicles (engine oil, transmission fluid, diff fluid) and have never had issues or experienced any abnormal wear.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 4
    Clean!!!
    By  REG,  a  Verified Buyer  from  BC  on  July 25, 2021

    Describe the issue

    Car runs smoother- good insurance for the fuel system
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    WORKS GREAT
    By  JAMES,  a  Verified Buyer  from  SC  on  July 23, 2021

    Describe the issue

    This works very good in my Optima with GDI. The best I have ever used and the price is really good for what it does.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Made a difference
    By  JOEL,  a  Verified Buyer  from  Florida  on  July 20, 2021

    Describe the issue

    Used it on a used 2007 Honda Accord V6. It helped bring the engine run smoother. Used with Amsoil motor oil, flush and filter.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Happy I purchased this stuff
    By  DAVID,  a  Verified Buyer  from  South Dakota   on  July 15, 2021

    Describe the issue

    Beats any fuel additives I’ve used before!
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    1.8 mpg gain
    By  MATT,  a  Verified Buyer  from  Rome Ga  on  July 06, 2021

    Describe the issue

    A real fuel system cleaner I've gained 1.8 mpg in my truck
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Increased gas mileage by 2 mpg
    By  MATTHEW,  a  Verified Buyer  from  Minnesota  on  July 06, 2021

    Describe the issue

    I used this in my 2013 F150 before a road trip. I usually average 15 mpg on these trips but noticed that I had returned at 17.1mpg after adding this to my tank. Its been a little over a year since the last treatment and I'm noticing a slight reduction on mileage so its time for another treatment.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Great product!
    By  THOMAS,  a  Verified Buyer  from  Urbana,ohio  on  July 04, 2021

    Describe the issue

    Super product! It really works!
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Best fuel additive out there
    By  DOUGLAS,  a  Verified Buyer  from  Ancaster   on  June 30, 2021

    Describe the issue

    Stuff amazing, cleaned the injectors on my old Datsun with one bottle. Improved my mileage on my Elantra considerably, highly recommend it
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Fuel system taken care of too.
    By  JOHN,  a  Verified Buyer  from  Bothell, WA  on  June 26, 2021

    Describe the issue

    Nice to know that my fuel system is taken care of too when I service my vehicles.
    Bottom Line
    Yes, I would recommend this to a friend.