Does the 'Fuel Doctor' really work as promised?

[josephdupont]

Why will worn tires eat away at gas mileage? Smaller diameter.. more worn more smooth.

[wcemichael]

While it could be possible to send a signal through the electrical system from the cig-lighter. This thing would have to be able to totaly reprogram your on board computer system. and I really don't think you could do that though a cig-lighter. sources of electrical interferace can be controled by covering your electronics with a metal cover. But I'll bet they already have one...

[SweetWife84]

how can a cig-lighter plug device manage ECU? it doesn't even connected to anything but the battery, after all, it will eventually drain your battery for drawing more energy

[thejunkman]

There must be a bunch of suckers out there, the display at my local Advance Auto is always empty and the thing is $49! Anyone with even the basic automitve knowledge could figure out that this could NEVER work as advertised.

[lnxgod]

This product is a joke, Anyone who knows anything about automotive tuning would Laugh there ass off at this product. BTW I tune cars for a living.

[AnalogRocks]

My lighter plug in MP3 player was $9.00 and does as much as this thing does.

[Apollinian]

A car's electrical system is not just some hodgepodge of wires and fuses, least of all the parts controlling ignition timing. Even in older cars, the ignition system is a carefully made and calibrated system. And even when there is trouble in the ignition system, there is nothing you could plug into the cigarette lighter socket to change how it works, as that's a one-way, DC electrical line.

[ImDavidGurney]

All of Fuel Doctor Deniers probably believe in the holohoax.

[stetsonwalker]

@INSONIASXPOWER You my friend are in fantasy-land!

[Davidvideos83]

I began to research and read all the scam reviews after I bought it! I was pissed cause I thought I got scammed! I finally got it today of Friday! I plugged it in and felt like it was working! Maybe it is! Idk? I am usually very accurate when I go with my hunches! Almost scary accurate! And I really do think that there is something to this little gadget! If you think about the oil company's and such! They would want to put out negative reviews cause they want selfish profit!

[ausiscool]

@Davidvideos83 You either work for Fuel Doctor or are stupid. Even a basic understanding of the way circuits work and a peek at the FD-47s schematic will show you that this device has no merit beyond a phone charger, except that instead of being useful and charging your phone it lights up a few green LEDs. This objectively is rubbish. There is nothing to this and it saddens me that people buy this shit.

[sxwishman]

make less cargo on your car and remove other things u dont need less weight is better to mileage and also keep inflate ur tires it help alot to save gas .

[rentslave]

On the highway,I'm getting MORE than 25 per cent improvement.Around town,maybe 10-15 per cent.At these gas prices,it pays for itself real quick.But you go ahead and keep believing these Democrats.

[larryt7001]

@rentslave YOU ARE A LIAR!!! WORLD PRO's PRO REDUCER, otherwise known as the Fuel Doctor FD 47 is NOTHING but a modified cell phone charger. I have compared literally dozens of cell phone chargers and they are identical except your company altered it so that it can't charge cell phones due to placing a capacitor where an inductor should be... SO QUIT LYING!!!!!!!!!!!

[ImDavidGurney]

@larryt7001 Who are you calling a liar?They used to tell us that bumblebees can't fly?You probably believe that Obama's birth certificate is real.The Fuel Doctor works for me.

[rentslave]

The Fuel Doctor isn't like Obama's birth certificate;it's real.It won't work on cars greaseballs drive;they're too new.

[larryt7001]

ROTFLMAO!!! THIS THING IS A SCAM!!!!!!!!!!!!

[ImDavidGurney]

It's working so well for me,I don't have to waste money on a hybrid.It does take a few months,though.Don't stop believing these pimps.The oil companies are counting on you doing just that.The Flat Earth Society still has millions of members.

[stetsonwalker]

This is the same BS as the cow magnets taped to fuel lines of the 80s hell no it does not work!

[ImDavidGurney]

You have to try it out on 20th Century cars,not new ones.No wonder some still believe that Obama was born in Hawaii.