Review by Just a guy on MpgXtreme
Used this product for several months and didn’t notice a difference in fuel mileage. Also my vehicle’s engine started making noises it didn’t do before. Stopped making the noises after I ran a few tanks of fuel through my vehicle.
So being I have to write 100 words I guess I will say I decided not to use this product in my vehicle and don’t recommend it anymore either.
Also the caps will melt if you leave them in your car in the heat. So if you’re thinking about using the caps know that it’s at your own risk. I’m sure it was just me that had an issue and nobody else.