Skip to Main Content
Shop by Vehicle

Customer Ratings & Reviews

AMSOIL P.i.® Performance Improver Gasoline Additive

Product code : APICN-EA

4.9 star rating Read 1,150 reviews

Customer Rating

4.9

91% would recommend

  • 5 1066
  • 4 47
  • 3 19
  • 2 9
  • 1 9

AMSOIL P.i.® Performance Improver Gasoline Additive

4.9 star rating Based on 1,150 reviews
  • 5 star rating
    Works great
    By  BRIAN,  a  Verified Buyer  from  Utah  on  November 10, 2023
    Cleans very well and last a long time
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    PI
    By  RUSSELL,  a  Verified Buyer  on  November 08, 2023
    Worked great, up'd my mileage about 2.4 GPM
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Pi
    By  Ni nuit ,  a  Verified Buyer  from  Québec   on  November 06, 2023
    Vue la différence wow
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Awesome
    By  RYAN,  a  Verified Buyer  on  November 06, 2023
    This product improved my gas mileage by at least 2-3mpg in my Tacoma on the interstate. It seems to last fir several months too.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great product
    By  TIM,  a  Verified Buyer  on  November 06, 2023
    I do notice a few MPG difference when using this regularly. Minimal investment for keeping your fuel system clean and running in good order. Great product.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Top notch
    By  BRETT,  a  Verified Buyer  from  South carolina  on  November 05, 2023
    Had a little hesitation in my wife’s van, put this stuff in it and it cleaned it right up. Picked up a few miles a gallon also. It will pay for it self
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Smoother idling
    By  JESSE,  a  Verified Buyer  from  CA  on  November 05, 2023
    My car was idling a little rough, after a tank of gas with PI it is idling smooth again.
    Was this review helpful?
  • 5 star rating
    Only The Best
    By  HOWARD,  a  Verified Buyer  from  Montreal, Canada  on  November 04, 2023
    I've been using only Amsoil products since 2000 because they are the best.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Good stuff
    By  JOE T,  a  Verified Buyer  from  Chicago Hts,Il  on  November 03, 2023
    I say it all the time... I trust in the testing on Amsoil products and against Amsoil products that Amsoil almost comes out ahead of the rest in almost every category of testing. So, I'll be using Amsoil as long as I'm alive...
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great Stuff!
    By  LonBon,  a  Verified Buyer  from  Kamiah, Idaho   on  November 03, 2023
    This is a great product, the long drain interval is awesome! I’ve been using amsoil stuff for over 20 years, and I couldn’t be happier! Thanks for great products!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 4 star rating
    Slow but Steady
    By  MORRIS,  a  Verified Buyer  from  Regina, Saskatchewan  on  November 03, 2023
    I have only used this product 1 time so far. I did not notice much of a difference at first but by time I had used 1/2 tank of fuel I noticed my vehicle more responsive when I stepped on the accelerator and by time I had burnt 3/4 tank of fuel my mileage become notibily improved
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Happy with the products
    By  CORY,  a  Verified Buyer  on  November 01, 2023
    Run this in all of the vehicles. Never had any issues.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great stuff!
    By  Christopher,  a  Verified Buyer  from  Florida  on  November 01, 2023
    I used PI for the first time after an oil/filter change at 107k. I was amazed that I actually could feel the power and the fact that my gas mileage increased by 10%. This stuff really works.!!!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Wonderful Performance
    By  EDWARD,  a  Verified Buyer  from  Mesa AZ  on  October 30, 2023
    I have used this additive since Jan. 2015… Clean smooth performance, and improved optimal mpg😊👍
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Amazing product.
    By  BALRAM,  a  Verified Buyer  from  Mississauga   on  October 30, 2023
    I have been using all AMSOIL products for past 20 years. I have 3 cars with over 400000KM … still going strong. Dependent on AMSOIL.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    11 4Runner Trail
    By  DAVE,  a  Verified Buyer  from  NC  on  October 30, 2023
    MPG’s went up so that means it worked. Very happy with this product, will be buying more soon.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    This product is a must.
    By  DAVID,  a  Verified Buyer  from  Apsley, Ontario  on  October 30, 2023
    I won't change your oil if you don't use this product at least once a year, preferably before every oil change. It only makes sense to clean your fuel system and everything else for that matter before changing your oil and filter. Dirty fuel injectors contaminate engine oil. This product really works and I have photos to prove it. I recently removed the intake manifold on my friends 2005 BMW 325i with over 300000 km's on it with the check engine light on forever, I couldn't believe how clean the intake valves were that a photo was required, he used P.I. before every oil change for over 5 years.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 4 star rating
    P.i. Performance Improver Gasoline Additive
    By  MIKE ED,  a  Verified Buyer  from  Fort Worth TX  on  October 29, 2023
    I COULD NOT TELL THE DIFFERENCE IN PERFORMANCE AFTER USING THIS PRODUCT. I WILL USE IT AGAIN.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    New to this product
    By  LARRY,  a  Verified Buyer  from  Leesburg VA  on  October 29, 2023
    Like my AMSOIL engine oils they have a great reputation, so I gave this gas treatment a try. After a couple of days I noticed better performance and gas millage in all my vehicles, also if you compare prices on what you get, you can't beat AMSOIL.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Works as described!
    By  MARK,  a  Verified Buyer  from  Houston, TX  on  October 24, 2023
    This product works as described. Car had a little bit of a rough idle at 86k miles. Ran this through the tank and after a couple of fill ups, the idle has smoothed out and the engine is running strong.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?