Customer Ratings & Reviews

Helped to lower the exhaust tick I had. Less ticking sound from a 200004km 2.0 mivec engine.

Great additive, I use it every 3000 miles, or whenever I think my gas needs a little punch...Edd

My wife’s car gets 28 miles per gallon with out gets 29.5 to 30.5 with. It has more get up and go and the turbo reacts much faster with. Very pleased.

Works great and love the price.

I swear I've been getting more milage....

The performance improver makes a noticeable difference. I have used it a number of time and each time it has made a difference. Well worth the money and will definitely use it again.

On my 2013 BMW X5M I had a CEL keep coming on after hard acceleration at times. I checked the code and the gun showed nothing???? A friend mentioned it might be a clogged fuel injector so I put in the PI Performance 3 gas tank fill ups straight and the CEL went away for a few thousand miles. I normally use BP gas, but I was on vacation and only could find a Shell. The CEL came back, but when I got home I used the PI Performance again and so far so good. Maybe I got some bad gas from Shell?????

Been using it monthly

Added this to both of my vehicles, I'll trust AMS over any other companies out there

So does it work? I have no clue. I ran several of these additives through my vehicles, but Im not 100% convinced that there was any improvement in the performance or mileage of my vehicles. I added 1 bottle to a tank in my Cayenne S before visiting friends in AZ. Another bottle while filling up again for the way home to LA area in CA. Mileage didnt increase at all, ( 23mpg hwy) and performance didnt seem to increase either, but maybe my Porsche was already max clean from using name brand fuels. In any case case, I tried it in a non DI vehicle, ( Porsche Boxster S) and it didn't shine there either. So as a preventive maintenance measure I'd say go for it, but in my case, I have not notices any difference in performance whatsoever.

I use this a couple of times a year after an oil change, seems to put the pep back in the step!!!

Mustang GT running a little rough. Ran treatment and it smooooothed out and runs stronger.

Works great has never failed me.

I have been using PI for several years in both of my Corvette ZO6s. It eliminates carbon buildup and helps the engine run smoother with regular usage. I use only Top Tier gasoline. It is very noticeable if I run out and don't add PI every third or fourth tank of gas...I have a 2006 and a 2015...both cars react similarly to the additive. Plus, both get a little better gas mileage, too! I will not run them without using PI regularly...very satisfied customer.

I notice about 1.5 to 3 MPG increase for 3 to 4 tanks after using this additive.

I used this in my truck which runs great. I used this mostly as a preventive maintenance item. I did not see any improvement in performance but I will definitely use again

Always is good to know the fuel injectors get some cleaning when this is in the tank.

Use this in our Camry LE every 2000 miles or so Increases mpg and engine runs smoother

HAD A ROUGH IDLE AND HESITATION PULLING AWAY FROM A STOP AND DECIDED TO PUT SPECIAL JUICE FROM AMSOIL IN GAS TANK! CLEARED EVERYTHING UP AND NO PROBLEM NOW! IT MUST HAVE CLEANED UP SOME CARBON BUILD-UP SOMEWHERE IN THE FUEL SYSTEM!

Although this product does do the job, you’ll pay handsomely for it & there are similar products on the market that are just as good for less.