My Sante Fe 2003 his 189K + miles. Had a check engine code for p0420 -Catalyst System Efficiency, and my Car was idling a bit rough. Tried this stuff out. my check engine light is now out, and the car is idling smoother now. Great stuff in my opinion.

this is pretty good

Is it safe for carburators?

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.