Product Reviewed: Gasoline Fuel Additives
Current Rating: 4.91 out of 5 stars
Votes & Reviews: 371 vote(s) and 230 user reviews.
Reviewed by Dan: 
All fuel systems should be cleaned from time to time as preventative maintenance. No matter how good your fuel is your system can get various deposits throughout it thus negatively affecting the fuel systems performance and fuel milage. This product lived up to its claims in my vehicle and will be used as needed in all of my vehicles.
Reviewed by Devolm:
I'm very happy with this product and will ordering more soon
Reviewed by Subie Speedy:
I've been using AmsOil synthetic oil and oil filters for a while now on my cars and also add the P.I. gas additive now and then just to give it a boost. I noticed using the PI additive is much better than other similar products and I don't have to use them too often. Once or twice a year helps keep the cars performing.
Reviewed by Charlie TUNA:
Does what it says on the bottle!! Great product.
Reviewed by Mikey:
I have used this product for many years in all of my cars, trucks, and motorcycles. During that time I have never experienced a fuel-related problem. I get flawless engine performance, increased fuel mileage, and NO trips to the repair shop for dirty fuel injectors.
Reviewed by SHUZAAM:
Simply put it in your tank, fill it up with proffered gasoline, and drive off.
Cleans your system and improves mpg' garunteed. ITS ON THE BOTTLE.
Reviewed by AcuDoc:
Boosted MPG
Reviewed by AcuDoc:
Boosted MPG
Reviewed by don't have one:
The product work as advertise nothing special, didn't see any great performance.
Reviewed by none:
The product work as advertise nothing special, didn't see any great performance.
Reviewed by One Crank to Another:
My old truck has needed new injectors for a few years, but the repair costs more than the vehicle. PI clears the check engine light and literally gets it firing on all cylinders again.
Reviewed by Ron906:
I use this product all year in my two cars and truck. It keeps my fuel injection clean also the carb on my Olds. Great product.
Reviewed by ZH:
Great product, really makes a difference in restoring engine performance.
Reviewed by ZM:
Great product, really makes a difference in restoring engine performance.
Reviewed by wtrbxr:
Used this in my 1999 ford f150 with 239,000 miles. Helped with a hard starting issue and seemed to smooth out my idle a bit. When I use this consistently my truck does not knock and ping on regular unleaded.
Will be using more consistently from now on.
Reviewed by Chi:
Great product
Reviewed by LGC driver:
Pour it in, fill the tank and go. Does everything else. I treat my gas every 7000 miles. No issues ever
Reviewed by Dg:
Just keep using this product because it works
Reviewed by GRN:
I can see an increase in mileage.
Reviewed by mm:
keeps my truck running great, cleans my fuel injectors improves my gas milage.
Reviewed by cam50cam:
I recently added this to my 2016 Sequoia. Can notice a quicker throttle response and better running vehicle
Reviewed by Tu D Truong:
This product is very good keep my engine run smooth
Reviewed by Lipster:
I bought a small bottle of P.I. to try it out. I used a little in my Harley, a small amount in my Camry and a small application in my S10 pickup which is approaching 300,000 miles.
In all three, the results were beyond just noticeable. Better performance, smooth application of power and very responsive.
I am a believer!
Reviewed by Hammer51:
I use it in my 2006 Mark LT when we go on trips and I believe we get about a mile more to the gallon. I have 120000 miles and have used Pi in the L T about four time back and forth to Ohio.
Reviewed by Mr. HoneyDo:
Not sure how well it worked as I put it in the wife's car. She didn't complain about anything so it at least didn't make anything worse. I really like AMS products and this is another quality item. Will purchase again.
Reviewed by None.:
I add this product when I fill up my gas tank once or twice a month. It negates the negative effects of the water in the gas, makes my vehicles run better and cleans.
Reviewed by PaPa Mike:
Every time I use this additive my mpg always increase by 1 to1.5 ! I'm surprised at how even top tier gasoline can use extra cleaning for a better burn.
Reviewed by Matt:
Used Amsoil PI in a number of cars and every time I use I get better gas mileage and better throttle response.
Reviewed by Jerry Rumba:
I have used this product in all my vehicles a few times a year at fuel fill-ups. I use top tier gasolines, but short drive habits and traffic congestion are problematic to deposit buildup. I product focuses on fuel system performance unlike so many that say you can put the same product in your gas tank and in your engine oil. That just sounds like bad plan.
Reviewed by Brent:
I have a 2005 Chevy 3500 with a 6.0 L it was getting 6 mpg . Cleaned air filter and put this in tank it went to 12.6 mpg and on next fill up , I got 9.6 mpg (I did pull my trailer ) that week but will try the pi fuel additive again
Reviewed by D:
I use this product in all of my vehicle
Reviewed by Jay:
I used to use Sea foam, but this product is better and it is less expensive.
Reviewed by Suspension Jeff:
Pour in tank like it says! You'll get improved performance, vehicle runs smooth & great acceleration!
Reviewed by Ed G.:
I have added a pint of this every 3 months for the past several years and my injectors have stayed clean. I have over 125,000 on my Camry and the mileage is the same as when I first got the car..
Reviewed by Ed:
I have added a pint of this every 3 months for the past several years and my injectors have stayed clean. I have over 125,000 on my Camry and the mileage is the same as when I first got the car..
Reviewed by grandka:
seems to help quite a bit when I use it
Reviewed by MtnBiker:
Putting this in my tank every 4k keeps my 2007 F150 running in top form.
Reviewed by Rob:
I added it to the recommended amount of gas.
Reviewed by Rob:
I added it to the recommended amount of gas.
Reviewed by Lycanit:
No issue noted and no loss of mileage. I attribute that to regular use of PI. Strongly recommend
Reviewed by Racerscott3:
2007 Envoy with 5.3 V8. Changed spark plugs at 110,000 mi. Looked excellent! No injector issues or fuel pump problems. Get 18 mpg regularly. All lubricants in this vehicle are Amsoil.
Reviewed by Jamie1177:
Actually gained 1MPG.
Reviewed by
Jamie1177:
Actually gained 1MPG.
Reviewed by Gospelcoach:
This product is amazing. I have been using it for three years now, and the results are the exactly what is promised. I used a bottle every 3000 miles in all three of my cars.
Reviewed by Bobcat1:
I have a Land Rover and an Acura RDX. Both say use only premium gas. By using API every 5K or so I had absolutely no problems. Highly recommend it!
Reviewed by Dwillz:
Noticed a change in my gas mileage right away!!!
Reviewed by steve:
Every time I use this, my vehicles run better and mpg goes up as well. Recommend highly
Reviewed by
Dave507:
Works great
Reviewed by Dave507:
Works great
Reviewed by Airwreck Nest:
Smoothed out the idle and throttle response improved. I don't recommend using this all the time, but I think it is a must with every few oil changes.
Reviewed by goody:
I have been using Amsoil PI for over 30 years and never had problems with fuel injectors or valves. I even put some in my gasoline supply that I use to power mowers and snow blowers.
Reviewed by Eriction:
Smoothed out the idle and throttle response improved. I don't recommend using this all the time, but I think it is a must with every few oil changes.
Reviewed by Ghost Runner:
I use a bottle every 5K. I'm on my third use. Each time I use it the idle of the engine gets smoother.
Reviewed by Ricky racer:
I use this in my camaro to help me out with the lack of performance and mpg.
Reviewed by Jackknife:
I use this every oil change, works great
Reviewed by Electric:
l usually sad a bottle to tank gas every 5,000 miles to prevent any trouble with gas and engine
Reviewed by Mysftail:
A few vehicles ago I noticed that my truck was running sluggish, so i purchased this product. The next oil change I added it and it did everything I had hoped for. Truck ran better, received better gas mileage, and saved me a trip to the dealer.
I recommend the P.i. improver, and use it on a regular basis.
Reviewed by J&J:
They are a must do to improve performance
Reviewed by J&J:
They are a must do to improve performance
Reviewed by Timbo:
Seen immediate results when I put this in my truck. Improved the idle better than several other products that I have tried.
Reviewed by BusaTim:
Seen immediate results when I put this in my truck. Improved the idle better than several other products that I have tried.
Reviewed by Ric:
This product has done an excellent job of cleaning the gunk out of my fuel system and injectors.
Reviewed by RawEffect:
Put it in gas as per directions, drove it around in my 2012 work van, 140,000km. Normal average consumption is 11.8 to 12.4L/100km, and I fell in that range for the treatment tank, and the following tank. Can't say if it cleaned anything out, but I can say it didn't help mileage.
Reviewed by Ric:
This product has done an excellent job of cleaning the gunk out of my fuel system and injectors.
Reviewed by Chris:
Use it in all my vehicles, snowmobiles, motorcycles, and other gasoline powered stuff.
Reviewed by Mauro P:
I've been using Amsoil for years great products especially this fuel additive see a difference in vehicle performance on first fill up
Reviewed by dchan:
I t help the car more power and clean a lot of unused item
Reviewed by Moe:
I've been using Amsoil for years great products especially this fuel additive see a difference in vehicle performance on first fill up
Reviewed by Chad:
Put this in your fuel and a tank later you'll feel lower shift points, less shifting with inclines, better fuel milage. I attest to this great product. Never felt the difference with other top brands.
Reviewed by Charles:
I used on a 2008 Mercedes Benz c300 and got great results.
Reviewed by Brian:
smoothed out my idle and the car has a bit more zip now!
Reviewed by David:
It actually works amsoil is a excellent product I use amsoil in every car I own. From this to there oils.
Reviewed by David:
This stuff is a must a every oil change.
Reviewed by Gerald:
I will be running this in all of my autos twice a year fall and spring.
Reviewed by GREG:
This is the best fuel treatment hands down
Reviewed by Denis:
Each two months I invest to keep up clean the combustion chamber. It's a no brainer.
Reviewed by William:
For years I used chevron techron fuel system cleaner. This product is only a couple dollars more, and does a much better job.
Reviewed by Stew:
My friends & I use this product every 5000 miles & we love it !
Reviewed by Gene:
I dont use it all the time but every time that I have my freeway MPG jumps from about 27 to about 30
1999 C5 Corvette.
Reviewed by ANDRE:
every 4000 miles in the tank thank you
Reviewed by Joshua:
You put it in your gas tank and it leaves through you tailpipe ..... How can I review a gasoline additive? I "think" it's helping but I'm not sure.
Reviewed by Mark:
I use this about once a year...usually during the colder months to improve mileage and performance. It seems to help with mileage, though not sure about performance, as it appears negligible. Overall, this is a useful product. My hope is that it cleans out some of that terrible ethanol garbage we get at the pumps these days.
Reviewed by TIM:
This is truly the best product of its kind available and delivers what it promises; I use a bottle at every oil change !!!
Reviewed by Floyd:
Keeps engine running smoothly and good performance on gas mileage.
Reviewed by LANCE:
After a long winter in storage, I toss a bottle of this into my 99 VFR800 fuel to give it that spring clean, it has not failed me yet, the bike always flashes right up and runs like a dream for the season.
Reviewed by ANDREW:
Added mpg, and engine runs smoother
Reviewed by ANDREW:
Added mpg, and engine runs smoother
Reviewed by ANDREW:
Appears to add mpg, and engine runs better
Reviewed by Alan:
I use one every 6 months. Keeps the injectors clean. Difference is noticeable.
Reviewed by Shane:
Great product when used as directed.
Reviewed by Thomas:
I use PI every 5,000 miles to keep my direct injection fuel system clean.
Reviewed by Joseph:
Every time I use this on my 11 Colorado i5 my gas mileage goes up to 20 and it's runs smoother. I also get a couple extra miles to the tank
Reviewed by Brian:
I add this to my generator, mower, blowers,boat 9.9 hp, and vehicles. It makes a difference.
Reviewed by Stan:
Amsoil products are great.
Amsoil as a company, poor. Always charging more than the total paid after the items ship, shipping cost through the roof, taxing shipping...
Free gifts now!! Yeah, never saw one of those...
Reviewed by Karvoris:
I use twice a year with 93 octane gas no issues great results.
Reviewed by Timothy:
I bought a new to me 2014 F-150 FX2 with all the bells and stuff. I have been using the Amsoil products for years,
and really like the performance that I get out of them. My hats off to the guys that make our cars and trucks
not only run better but last a heck of a lot longer. Very satisfied Pro shopper!!
Reviewed by Joshua:
This is the best stuff I've ever used
Reviewed by Tim:
Great product. Unbelievable.
Reviewed by Tim:
Great product. Unbelievable.
Canada
United States
NOT snake oil!
Hey! This stuff works! I'm able to monitor multiple points on engine performance as I'm driving. I can see the process of cleaning dirty injectors as I'm traveling down the road, and it does as advertised.