Gumout 510014W Regane Complete Fuel System Cleaner, 6 oz

[This review was collected as part of a promotion.] Honestly surprised how well it worked. I added this when I filled up my gas tank and you can tell how well it works! I started getting better mpg. Very convenient and easy to take with you or to keep in your vehicle.

This stuff seems to be pretty good. After running in multiple tanks back to back my gas mileage has come up about 4mpg. It seems to make a difference!

[This review was collected as part of a promotion.] I wanted something simple to keep the fuel system clean in my car since it has a lot of miles. I tried this fuel system cleaner and it was very easy to use; just pour it down the gas tank before filling up. Honestly, I I can't say I noticed a significant change, but I will say the car seems to run slightly smoother. I think it's worth adding it once in a while as part of maintenance.

I used to buy Redline, but found out this has the same necessary additives necessary that actually make a difference, so I switched to Gumnout Regane Complete Fuel System Cleaner. I apply once every 5k oil change for my direct injection turbo engine to help keep it clean.

[This review was collected as part of a promotion.] This is a great product. My husband had his jeep sitting for a while and was getting everything going again. We decided to use this and it super easy. The gas was on E and we just added this to the tank. I absolutely believe this helped clean it out and run smoother. He has bought more since then for my car as well. Love how easy it is to pour in the tank with the long neck on the bottle. Good price for what it does. We will continue to use this and would recommend it.

[This review was collected as part of a promotion.] I use this in my jeep to help offset some of the fuel deposits from being rarely driven. I have noticed a difference in fuel economy and idle quality since I started using this. Expecially for someone like me who needs to clean my fuel system regularly from sitting I highly recommend this.

[This review was collected as part of a promotion.] Greatly effective engine cleaner. Use it when your fuel tank is almost empty. Pour in the bottle than fill up the tank. Gumout will clean the gunk from the fuel tank restoring the fuel efficiency. It's very easy to use and doesn't damage your car part or void warranty. Do it every time you get an oil change.

[This review was collected as part of a promotion.] I thought this fuel system cleaner worked pretty decent. I did see a 0.7 MPG increase in my average MPG. I would probably have expected to see a little bit more but I also do a lot of highway/interstate driving and it was through the mountains with lots of hills so there's no chance of a huge increase there. I like that the instructions were very simple and you can use the entire bottle in a tank up to 19 gallons. You put it in when your tank is almost empty and it was super easy to put into the tank. The bottle is shaped in a way that makes it easy to pour into your fuel tank without having to finagle it. My car has over 120,000 miles so I do feel like it did have some improvement but I will continue to monitor for sure. I did not experience any negative side effects from using this product.

[This review was collected as part of a promotion.] My son used it and was happy with the results. Instructions were easy to follow and he feels it helped with the noise and the power of his equipment. He would use it again to keep up with the maintenance of his equipment..

[This review was collected as part of a promotion.] I've used fuel cleaners before, but this one was easy to use and gave me peace of mind that my system was getting a good clean. My vehicle seemed to run smoother and more responsive during acceleration.