Works as designed...a little more expensive than the store products.

Fantastic product. Does what it says it will do!! Love it.

I place this in all four of my cars and this increases the mileage by 5% on 3 out of 4 cars. My pickup actually gets 2 miles more with this in the tank.

Noticeable improvement in power and mileage after use.

This stuff after 4 tanks made my old clapped out civic feel like it had another cylinder and boosted the gas mileage by 5mpg.

I give my BMW S1000XR a splash with every tank. It keeps the fueling flawless, mile after mile.

Not how the directions say but I usually put a few oz in with each fill as a maintenance dose. I usually buy nonalcohol top tier gas which means it has a good amount of cleaners added at the blender. I drive my daily drivers over 300,O00 miles and so far no O2 or fuel injection problems. Fuel pumps usually last about 200,000. I drive my dailies over 300,000. Also have '54 inline 6 with 6V points ignition. Plugs stay clean for 10,000 miles which is my replacement interval.

seems to work as listed.

Use it mainly to keep the injectors clean for a smooth HP 2017 5.0 Coyote. Appears to do just that. No negatives!

Put this in before a long constant mph drive, big difference in mpg for a new V8. Good for the recommended interval.

I use this product in my truck to keep the fuel system clean works great,,, as all amsoil products do,,, would recommend... 👍

I can confirm that this product works "as advised" on five different vehicles in my driveway. A 2013 Charger R/T, 2015 Charger R/T, 2004 Jeep Grand Cherokee Limited 4.7, 2008 Ram 1500 5.7, 2011 Infiniti M37x. Better MPG (noticeably better), better throttle response, faster, easier starting, smoother idle, quicker, more effortless acceleration and all around stronger running engine in ALL 5 vehicles with just 1 bottle/treatment. I've been using NOTHING but Amsoil in all of my vehicles for over 15 years and I've never had any problems or complaints, just positive feedback to pass along. I'll never change to anything else!

Have used this for years on multiple cars. After running it through one tankful of gas in our current Subaru I can feel an immediate difference in engine smoothness, throttle response and acceleration.