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 1,141 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
    Seems okay
    By  Karp,  a  Verified Buyer  from  WDC  on  January 10, 2024
    This is the first time I am using this additive, yet it seems to be working okay. My 2005 F-150 has 93K on it and I have babied it since it was new. I would use this product again.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Seems to help enough
    By  JACOB,  a  Verified Buyer  on  January 08, 2024
    I don't actually think my vehicle needs this cleaner as it's low miles with the best premium fuel I can find. It did help milage during and after use though. I look at it as a maintenance item and I'd rather make it to 100k with factory injectors than replace.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great product!
    By  GARY,  a  Verified Buyer  from  Iowa  on  January 06, 2024
    I used the Amsoil gasoline additive in my Escalade and Dodge pickup. It brought the Escalade to life and gave my pickup a newfound boost of power. I use one bottle with each tank of gas. My miles per gallon has increased and gave me a quick needed boost. I would definitely recommend this product. I will be using it also in my Harley next spring.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 3 star rating
    Tried in two cars
    By  GREGORY,  a  Verified Buyer  from  83530  on  January 06, 2024
    I tried in two different cars. The Subaru went down two miles per gallon. The equinox made no difference. I check mileage in all my cars every fill up and maintenance is written in the log book.
    Bottom Line
    No, I would not recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Amazing Product
    By  BOB,  a  Verified Buyer  from  West Palm Beach, FL  on  January 01, 2024
    I used to use Sea Foam and then decided to try the Amsoil additive. My GMC Sierra 1500 truck (over 175,000) idled better and ran smoother. Then when the check engine light came on a couple of times, I added this and the light went off! I've used this in my boat (Mercury 75 4-Stroke), as well and it works wonders there, as well. I now have a box of these I use regularly.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Gasoline Performance improver
    By  IVAN,  a  Verified Buyer  from  Tennessee  on  January 01, 2024
    This product was everything i expected it to be.... would highly recommend !!!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    New Pickup and Old
    By  HARVEY,  a  Verified Buyer  from  Texas  on  January 01, 2024
    New customer and just started using Upper Cylinder Lube. In new truck, sounded better on first tank. Will know about gas milage in a few days when we take a highway trip. Gave one to my brother-in-law and he said his computer was saying 5 mpg increase on 2.7 L Ford truck with over 200,000 miles. Gas milage said 30 mpg.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    P.I. Performance improver Gasoline Additive
    By  JAMES C ,  a  Verified Buyer  from  Green Valley, AZ  on  December 29, 2023
    This product is outstanding. I put in a small container every 3,000 with a fill up to keep all the moving parts in the engine clean and doing their job. I find the gas mileage improves. It is vital to deal with cheap gas as well. I try to select the station with the superior gas but it is becoming more of a challenge. The additive compensates for the inferior gas and is a must to keep the engine clean.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Helps your gas
    By  MANNY,  a  Verified Buyer  from  Fayetteville NC  on  December 27, 2023
    Awesome product really helps your gas and fuel system stay clean and running smoothly highly recommend try it and see the difference in your vehicle
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great Fuel system cleaner
    By  RICHARD,  a  Verified Buyer  from  Thomasville Pa  on  December 26, 2023
    Use every 5000 miles, great product
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great Product
    By  RICO,  a  Verified Buyer  on  December 17, 2023
    This fuel additive works great and I use it every oil change to keep my engine clean and boost my car's performance.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great value
    By  KYLE,  a  Verified Buyer  from  Northwestern Ontario Canada   on  December 15, 2023
    Great product to keep my engine clean, and slow down deposits.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Additive
    By  JAY,  a  Verified Buyer  on  December 14, 2023
    Great product
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Better Gas Mileage
    By  NICK,  a  Verified Buyer  from  Greeley,CO  on  December 13, 2023
    I notice that I got better performance. Better throttle response and more power!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great Cleaner
    By  TODD,  a  Verified Buyer  from  West Virginia   on  December 12, 2023
    Just recently bought a 99 WS6 Transam that had been sitting for a few years and It had a rough idle at times. After using 1 bottle of this I could definitely tell a difference. The idle is much smoother. I am going to use 1 more bottle then start following the recommended time. Another great Amsoil product.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Jeep / Jetta
    By  ANGEL,  a  Verified Buyer  on  December 11, 2023
    Amazing I used in all my 3 cars …. Love it
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great product
    By  JAMES,  a  Verified Buyer  from  Ocala Florida   on  December 11, 2023
    I love this stuff, my engine idles smoother and got 3 more miles to a gallon, love it.
    Was this review helpful?
  • 5 star rating
    Proven power
    By  ISSOUFOU,  a  Verified Buyer  on  December 10, 2023
    I add this to the tank at filling and after couples Miles I can notice the change in quick shift response
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Pi Performance
    By  LEONARD,  a  Verified Buyer  from  EL Paso ,Texas   on  December 10, 2023
    Superior product I use it regularly and even send it to my daughter in Denver Colo. who loves it too . My son in Oklahoma uses it too . We are Amzoil believers and users !
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Pi performer
    By  MARK,  a  Verified Buyer  on  December 05, 2023
    Good
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?