i have used Red Line and Amsoil Pi for my Mazda 3 and Amsoil Pi came on the top. Excellent product highly recommended little expensive to get in Canada but worth every penny.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Makes a great gift
By 
SCOTT, 
a 
Verified Buyer 
on 
February 07, 2025
Been using it for a while and it works great been consistently getting better results with it used as recommended super fast shipping and easy to use
I have been using this is my 1/2 ton farm truck and wife's 16 Tahoe. It really cleans and have noticed it neutralizing the fuel. My fuel trims and changed and a big notice in my alcohol content is way better. I have also noticed we do not have to complete intake cleanings near as often. Helping with carbon build up. We have noticed a slightly better fuel milage. This has slowed the demand for "fuel tank evap as well". Again, THANK YOU AMSOIL.
By 
PG, 
a 
Verified Buyer 
from 
San Antonio 
on 
January 26, 2025
I've used PI for almost a decade now and as far as I'm concerned, its one of the best products AMSOIL makes. While I use it with my cars - and if you start using it early in a car's life, it's going to help keep it from having fuel injector problems - I also use it with small engines. I have a 30AMP generator that wouldn't start at all. I had used fuel with ethanol in it before I became aware that could cause issues. After multiple attempts to start the thing, including using Power Foam in the carburetor, no dice. I figured I'd have to take it to a shop for repairs, but I decided to put in PI with some ethanol free gas and amazingly, that generator cranked up. Shut it off and started it again the next day, no problems starting. Put a half bottle of PI in there with non-ethanol gas and it ran until it was out of fuel.
That was 7 years ago, and that generator hasn't given me an ounce of problems starting/running since, including during the Texas deep freeze of 2021 when we lost power for 3 days in sub-20 degree weather. It ran for ~ 55 hours pretty much nonstop. Not going to say PI is magic or a cure for bad maintenance/operation but it worked for me.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Great Product
By 
DION, 
a 
Verified Buyer 
on 
January 21, 2025
Great product running it in all of my vehicles. Noticed a big difference in the performance of my vehicles. Used to use a different product, now I'm team Amsoil for sure.
I’ve been using Performance Improver for years, currently my 22’ Toyota & 2013 Honda.
Improves gas mileage & gives you an engine boost.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Great product
By 
ANDRES, 
a 
Verified Buyer 
from 
Toronto  
on 
January 11, 2025
I have using it for a while , it does the job
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Definitely worth the money
By 
Bill, 
a 
Verified Buyer 
on 
January 09, 2025
Fuel Mileage increase is noticeable. Lasts a few tanks after.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Good stuff
By 
JOHN, 
a 
Verified Buyer 
from 
New Jersey 
on 
January 08, 2025
I always use this on my last empty tank 20 gal fill-up before changing my 2013 Silverado 6.0 gasser's oil. I also use it along with the Upper Cylinder Lubricant too at the same time with good results. I definitely notice my truck running smoother for a pretty good long while afterwards. Give it a shot!
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Noticeable performance improvement
By 
TOBY, 
a 
Verified Buyer 
on 
January 07, 2025
As the product cleans during the tank of gas usage, gradual improvement in performance is noted and definitely is noticeable after running the entire tank of additive containing fuel through.
I haven't calculated the actual mpg increase, but it has definitely helped.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
The good stuff!
By 
KYLE, 
a 
Verified Buyer 
from 
Thunder Bay, Ontario Canada  
on 
January 06, 2025
Great value for a product that works as advertised.
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Performance improver gas additive
By 
MELVIN, 
a 
Verified Buyer 
from 
Alberta  
on 
January 05, 2025
Car runs 100% better starts instantly in cold weather improved mileage
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
2013 Corolla
By 
MICHAEL, 
a 
Verified Buyer 
on 
January 04, 2025
I couldn't believe how quickly I noticed a difference in performance in less than 100 miles smoother,stronger on a 160k plus Corolla
The AMSOIL Performance Improver Gasoline Additive has improved my gas mileage and keeps the engine running smooth. I use that in between using the Upper Engine Lubricant. I would recommend these products for any vehicle.
Bought a 12 pack, started adding 1 every fill up, checked mileage before and after, maybe 1/2 mile per gallon better. For the cost per bottle, doesn’t justify 1/2 mile per gallon. Sorry….
Free Shipping on orders of $100 US ($130 CA) or more.
Birthday Gift of a $5 coupon to help celebrate your day.
$5 Back with every $100 you spend.
Exclusive Offers throughout the year.
Free Membership renewal when you spend $500 or more.
Plus, Preferred Customers receive the quarterly AMSOIL Magazine with the latest product details, technical information and complete product catalog. Learn More >
Special Offers
Your browser is outdated.
Thank you for visiting www.amsoil.com. Certain parts of this website may not function with Internet Explorer. To continue shopping with us, please update your browser using one of the options below.