I but this product at Home Depot for half of what Walmart sells it for. I use it for my 97 4RUNNER with 250, 000 miles. I don't know what they put in these tiny bottles but IT WORKS! I can easily notice the difference. Better performance, better power, smoother acceleration. The best $2 investment for better performance! I use a bottle every time I fill up.

Using this product second time in a row, my car is Honda city model 2006 done millage 150,000 km till now. I found drop in pick and my car engine knocking while running on road. Is this because of Gumout or some thing else.

Have been using this product on a regular basis. I use one bottle when the check engine light comes on in my 2005 Town and Country and the light goes out for months.

Was really impressed how it smoothed out the rough idleing and improved fuel mileage.

I have Been A Long Time user of this product in all my High Mileage Vehicles , 191,000-220,000181,000 used by my sons in school and in the military one og]f which was used in the winters of North Dakota!

Needed t clean out my carb so I brought this product. Did a great job on my old car with a lot of miles..

Pour it right in your tank and it starts to work. You can feel the change right away.

i used the product on my 2000 Toyota it gots over 100000 miles on it i used it and it clean it all out i get better gas mileage now i would recommend it to all my friends

My car with 117,567 miles runs a lot better with this fuel system cleaner...thanks Gumout

The imaginary line I once set to keep my wife away from my Chevy has been gone for years. A great product that helps insure the life of my child remains young and high on performance

i noticed it doesnt work as long as it says but while it it did, it did amazing

My car with over 100,000 miles on it was pulsating and getting really bad gas mileage. I figured it was the fuel injectors, so I bought this and it has completely stopped my cars pulsating and the gas mileage has improved greatly. My car runs great now.