Seems to work great.

Best result ever, 233000 klms Runs like new.

I use this product once a year or so and my car starts fine with no problems and my gas mileage has remained stable of the last 5 years.

Used it for my Nissan Altima Hybrid 2011 with 55000 miles, and the car got smoother..

Been using Gumout for 8 years, Feel like it's a quick and easy way to provide additional protection against engine issues.

This product keeps my vehicles running smooth and helps with gas mileage.

I have used your products for many years & never experienced any problems in my vehicles fuel system. In fact, the air filter even stays cleaner for longer.

I used the fuel system cleaner with Regane in my 2000 Miata when the idle was rough. One treatment resolved the rough idle issue and the car now idle smoothly. I was impressed.

I have been using this product for years. Nothing cleans as good; I been telling my friends to stop using the imitators and use Gumout.

this product does what it says ,best cleaner and stablelizer that I have ever used

I was getting 33 mpg in my '14 Cruze (12k miles)...that was down from the 36 I had the first month. I put in a bottle, filled the tank, and got 38 average for the whole tank (avg 45 mph). I try to run ethanol free but only am constricted by necessity often, so only get it e-free about half the time. I did not think it could happen so quick, but this stuff fixed it even quicker!

I use the complete engine cleaner in my two Chevys to keep them running at peak performance.