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Customer Ratings & Reviews

AMSOIL P.i.® Performance Improver Gasoline Additive

Product code : CPICN-EA

4.9 star rating Read 1,141 reviews

Customer Rating

4.9

91% would recommend

  • 5 1057
  • 4 47
  • 3 19
  • 2 9
  • 1 9

AMSOIL P.i.® Performance Improver Gasoline Additive

4.9 star rating Based on 1,141 reviews
  • 5 star rating
    Great product
    By  DUANE L.,  a  Verified Buyer  from  PA  on  April 09, 2024
    Helps with upper cylinder cleaning and fuel efficiency. Not sure exactly what the average mileage is raised but near 1 to 2 miles per gallon.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Delivers on its promises
    By  ROGER,  a  Verified Buyer  from  Texas  on  April 04, 2024
    Excellent product that does exactly what it promises. Same road trip, started at 20.5 mpg over 100 miles. Added Performance Improver at next fill up in my 165k mile 2014 GMC Sierra with the 5.3L L83. Increased fuel economy and throttle response over the second half of the trip. Got 22.1 mpg. This improved fuel economy has persisted. I have filled up 5 times since then and the improved fuel economy is noticeable. I highly recommend this product.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Performance
    By  william,  a  Verified Buyer  from  Connecticut  on  April 03, 2024
    I use the gas additive once a month and my engines runs clean and smooth!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 3 star rating
    Works as Advertised
    By  MICHAEL,  a  Verified Buyer  from  Kentucky   on  April 01, 2024
    It worked as advertised just like every other product I have used from AMSOIL.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Solved my rough idle
    By  BRIAN,  a  Verified Buyer  from  Kincardine   on  March 31, 2024
    I had been experiencing a rough idle and acceleration with my 2016 VW with a V6 engine. I previously tried several other products to correct this. None worked. Using one bottle improved the issue and a second bottle eliminated it entirely I now use one bottle every few months as a prevention
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great
    By  MICHAEL,  a  Verified Buyer  on  March 30, 2024
    Made my car run great again.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    P.i
    By  RALPH,  a  Verified Buyer  from  North Carolina   on  March 23, 2024
    I’ve been using P.i. additive for a few years and feel it works well
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great Additive
    By  GARY M,  a  Verified Buyer  from  Flowery Branch, Ga  on  March 14, 2024
    Install this in both my vehicles every 5k oil change, keeps fuel system especially injectors operating properly.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Seems to be legit
    By  NICK,  a  Verified Buyer  from  Long island new york  on  March 11, 2024
    So my older tahoe will ping slightly if I use regular gas.. ran a bottle of this thru her and ping is no longer present with regular gas
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 4 star rating
    Rev'd up...
    By  BEN,  a  Verified Buyer  from  Edmonton,Ab.  on  March 10, 2024
    put Amsoil in my snowmobile after sitting all summer, perked that 4 stoke into a smooth running machine..
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    We use instead of Techron
    By  RONALD,  a  Verified Buyer  from  AIKEN SC  on  March 09, 2024
    We only use Circle K non-ethanol gas now. This helps keep the fuel injection systems clean on our collection of 1990 to 2016 vehicles.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Excellent stuff
    By  DOUG,  a  Verified Buyer  on  March 09, 2024
    Excellent stuff I noticed my vehicles running a lot better
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 2 star rating
    No Noticeable Improvement...
    By  GEORGE,  a  Verified Buyer  from  Marxist Empire of Southern California  on  March 05, 2024
    I didn't notice any difference. The car had no performance problems beforehand.
    Bottom Line
    No, I would not recommend this to a friend.
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  • 5 star rating
    Works like it should.
    By  RAY,  a  Verified Buyer  from  Minnesota   on  March 04, 2024
    Comparing this to gumout product. This seems to perform better and get better results. I would highly recommend people to give it a try.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Pays for itself
    By  JEFF,  a  Verified Buyer  from  Alabama   on  March 03, 2024
    I use this regularly in all our vehicles. Keeps them running like new and with high quality gasoline can give you better fuel economy.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Improving performance
    By  RODGER,  a  Verified Buyer  from  Roseville, California   on  March 02, 2024
    The P.I. Is a noticeable difference in improving the performance of my Ford 4.6L V8 SportTrac AWD.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    This stuff really works
    By  PAT,  a  Verified Buyer  from  Ut  on  March 02, 2024
    Amsoils P.I. gas additive really does work, the extra power it adds is actually noticable!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Excellent product
    By  DERRICK,  a  Verified Buyer  on  February 28, 2024
    Great product. I have been using it for years!
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    The best
    By  STEPHEN,  a  Verified Buyer  on  February 23, 2024
    This is the best on the market.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Definitely recommend
    By  DOUG,  a  Verified Buyer  from  Florence Ky  on  February 18, 2024
    Awesome product used in my truck and could tell a difference
    Bottom Line
    Yes, I would recommend this to a friend.
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