Gumout 510015 Fuel System Treatment, 6 oz.

Why did you pick this product vs others?:I've had great luck with Gumout Multi-system Tune-up, so I figured I'd also give this a try. It seems to work just as well. The difference before/after is not subtle. The engine seemed to pull effortlessly and very smoothly. Much more low end torque. And this was on 87 octane. I made sure total gas in the tank was about 15 gallons, so, somewhat below the maximum Gumout suggests, i.e. a concentration somewhat on the high side. Very very impressed. Will definitely buy again.

Left the auto shop with a request to clean my fuel injectors. Thus, I purchased this cleaner and just went to the same auto shop, and they didn't ask to do a fuel injector cleaning. I assume it worked!

Best cleaner I’ve used. When rebuilding carbs years ago, cleaned out anything I used it on. Now with fuel injection, ports are even smaller and still does an excellent job. Have been using this product for decades, only choice in my book!

Used one bottle during a fill-up and noticed slightly smoother engine performance. It’s hard to measure long-term effects, but for the price and quantity, it’s a great value. Easy to use and well-packaged. I’ll continue using it as part of my regular maintenance routine. One star off just because results aren’t dramatic.

All three of my cars are over 50,000 miles my cars are 2016 GMC 2017 Porsche Cayenne, and a 2021 Ford Explorer. So far it’s really worked well with all my vehicles plus I maintain everything very well but every time I do an oil change, I stick a bottle of this in my tank and I do it when the tank is done at almost empty hope this was helpful.Have a great day

Used all FairPlay good Price will ordert more soon

I could tell the difference after the first tank by looking at my MPG

Why did you pick this product vs others?:I put one in every other tank to help with the GDI carbon issues. Can't go wrong!