Pack 2 Pcs Fuel Saver Pro - About 20-30%

May I apologize for an earlier report of "questionable" for this product. It's truly better for long distance highway travel than I'd hoped it might be. Sincerely, Herb Bridgman

this product didn't save any fuel, it really does nothing but flash lights giving the illusion that something was happening maybe communicating with the ECM, but it just doesn't work. The only thing you'll see is flashing green/red lights with an occasional yellow light. very much like watching christmas tree lights

After installing the product was initially very happy with the performance but, after the first tank of gas the gas mileage dropped back to what it was before it was installed and actually a little below what it was before…what could be the reason for this? I would like some feedback on this please

It works GREAT I've gained 60 miles to my 4 door 4-wheel drive 2017 truck......some cars you might have to plug in your computer upload some info.... But I couldn't be more happy......I use to get close to 300 miles now 350-375 I am so impressed

It’s not a huge noticeable improvement. However, I do feel like it’s getting better mileage with the device. At today’s gas prices any change will amount to a significant savings.

Snake oil a total waste of money did nothing.

I like them, and I think they're working!!

Check your gas mileage before you use it .

Guter Preis aber nicht überzeugend

Does not work.

Also kann ich das Geld auch aus dem Fenster werfen sparen ist nicht mit dem Benzin