〠4Pack】 Fuel Saver Pro, Saving Approximately 15% Fuel, Fit for Models After 2000

I am in the testing stage for these units. I do not have any results of my test as of now. I have been told by various sources that these devices are completely worthless and therefore a scam product, but I de idea to find out for myself. Even though the manufacturer claims that it will increase the gas mileage drastically, this may just be an advertising scheme in order to get customers to buy their product. I am quite scheptical that such a small and simple device can be used on ALL models and brands of automobiles... considering that each different brand and model uses different computers, wiring, and more. As a mechanic for over 44 years myself, a "one-size fits-all" electrical device is highly unlikely to work on everything. In addition, this approach could also cause damage to the electrical systems of vehicles when used without prior authorization from the vehicle manufacturer. Serious testing of these units needs to be completed before customers should try to use one of these kinds of devices... ESPECIALLY on newer more MODERN vehicles which utilize many different computer chips throughout their electrical system. A short or malfunction of this device coukd cause THOUSANDS of dollars in damage to the car. Not only does there need to be more testing to determine whether tge device shows any increase in gasoline mileage, but the device needs to be disassembled to find out what is actually inside of it. There might be nothing at all inside. It may be just an empty case... nobody really knows without disassembly. In my opinion, with the price of these units being so cheap, I am very skeptical that there is much inside. Why would they not be selling for much more if they really gave the results claimed.?

So I have mine for a little bit of time now and I noticed that it is make my gas needle bounce. It doesn’t know if my Tahoe is half full or empty and it never did that b4. It seems to me like I’m using more fuel than I was. I’m spending more money because I don’t know if I’m empty or not. I’m taking it off and hopefully me car goes back to normal.

I bought these but don't know how to get them to work because they didn't come with any instructions

I am very happy w/this device. IDK how it actually works but it does. I have a 2017 Toyota Camry & the most miles I'd get was 435 on full tank. I have used this device for several months now & now I get 497 miles on a full tank. Then 507 mi. See photos I definitely recommend this. Buy it. Easy to install.

This product does not work.

I could not feel the reset, button move at all

Great Fuel Saver

Not sure if it is working because of not clear instructions.