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Fuel Doctor FD-47 Fuel Saving Device


Price: $29.95 & FREE Shipping on orders over $35. Details
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Sold by Microfiber-Products-Online and Fulfilled by Amazon. Gift-wrap available.
  • FD-47 increases a vehicles miles per gallon (MPG) by up to 25% through power conditioning of your vehicles electrical systems
  • Conditioned and clean power allows your vehicles electronic control unit (ECU), fuel injection and engine timing equipment to operate more efficiently giving you increased gas mileage
  • Engine runs more efficiently it will require far less fuel, produce more power and have reduced exhaust emissions (reduced CO2)
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Product Information

Technical Details
BrandFuel Doctor
Item Weight2.4 ounces
Product Dimensions11.6 x 7.5 x 1.3 inches
Item model numberFD-47
Manufacturer Part NumberFuel Doctor
  
Additional Information
ASINB0031BRN2I
Best Sellers Rank #163,524 in Automotive (See top 100)
Shipping Weight7 ounces (View shipping rates and policies)
Date First AvailableFebruary 13, 2008
  
Warranty & Support
Warranty, Parts: Parts
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Product Description

As a vehicle gets older, the power systems often will generate and experience more electrical noise or electrical interference. This electrical noise can have many detrimental effects on the vehicles systems and decrease their fuel efficiency. The FD-47 simply plugs into your lighter socket/power port and the power conditioning qualities of the FD-47 help to reduce and remove this noise and to restore your vehicles fuel efficiency. If your vehicle is designed for high performance or modified for increased power this unit may not have any effect on your fuel mileage. For maximum results use on vehicles that are over two years old.

Customer Questions & Answers

Customer Reviews

I only wish it were possible to give this device a negative star rating.
Werecow
Consumer Reports Magazine (Jan 2011) tested Fuel Doctor on 10 different vehicles and found no significant impact.
Night Reader
In addition, if this works the way it says, it will disable your car alarm.
C3

Most Helpful Customer Reviews

198 of 206 people found the following review helpful By Werecow on July 31, 2010
I only wish it were possible to give this device a negative star rating. Being an inquisitive electronics engineer, I disassembled one of these. It comprises a pretty plastic case, a few diodes, resistors and capacitors - none of which can have -any- effect on any vehicle's fuel economy or performance. The only thing it improves is the manufacturer's profit. Any claims to the contrary are written either by the sellers of this automotive "snake oil", or their victims, who unconsciously change their driving styles when the device is plugged in.
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130 of 136 people found the following review helpful By Duane on June 24, 2010
Verified Purchase
I purchased the Fuel Doctor for a trip from Las Vegas to Detroit and I found NO differance in mileage on my 1997 Pontiac Transport Minivan. I them tried it on my 1998 Buick Park Ave. I took a drive up round trip to Northern Michigan from Detroit and I found NO differance in mileage either. I think the Fuel Doctor needs a doctor. I requesting a full refund from Amanzon on this product because the claims that were made about an increase in fuel economy are FALSE!
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100 of 105 people found the following review helpful By Night Reader on December 8, 2010
Consumer Reports Magazine (Jan 2011) tested Fuel Doctor on 10 different vehicles and found no significant impact. Two of the vehicles were the older, high-mileage vehicles Fuel Doctor says it works best on. What does Fuel Doctor do? It lights up. And it separates you from your money.
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42 of 44 people found the following review helpful By C3 on July 28, 2012
As an Electrical Engineer I can tell you that the premise that this works under is totally bogus. What it says is that this is a voltage filter. The ECM (computer(s))in your car if properly designed are built to filter out voltage fluctuations and as long as you don't have any mega audio amps installed or the like, there is no need for additional filtration. In addition, if this works the way it says, it will disable your car alarm. Modern car alarms are designed to (once armed) detect slight voltage fluctuations caused by a dome light coming on because a door was opened or any electrical tampering. A slight change in voltage triggers the alarm. If this device truly prevents voltage fluctuations, this function of your alarm will be disabled.

People may find slight variations in their gas mileage with or without this device, but that is most likely due to either a slight aberration in the Standard Deviation of their statistics, or a subconscious change in driving habits as in the Placebo Effect. You know, a Self Fulfilling Prophecy...

Don't waste your money. Check your tire pressure and maintain your car according to the manufacturer's manual. That in addition to sensible driving habits (not speeding or tailgating) will get you better mileage than any magic device.
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54 of 58 people found the following review helpful By Amazon Customer TOP 1000 REVIEWER on December 9, 2010
A consumer magazine (I won't say the name but it starts with "C" and ends with "onsumer Reports") verified that this device doesn't work. If it did, then why didn't the auto manufacturers think of it?

"There's a sucker born every minute."
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45 of 50 people found the following review helpful By RL on December 19, 2010
Fuel Doctor plugs into your cigarette lighter and does nothing more than light up. There is no connection to your car's fuel system or engine computer. Thus, it can do absolutely nothing to improve your gas mileage. All it will do is empty your pocket of the [...] you spend to buy it. Don't waste your time or hard earned cash!
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33 of 37 people found the following review helpful By Michael W. Edmonson on May 7, 2011
Verified Purchase
I read mixed reviews about this product. but wanted to give it a try nonetheless. This is a piece of garbage! Three tankfuls and not even .1 difference in gas mileage. In fact it continually caused static on my radio while in use. I'm going to try sending it back to see if they will stand by their satisfaction guarantee -- if not I guess you can say there was another sucker born during this minute.
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20 of 21 people found the following review helpful By Jeffrey on December 15, 2012
ok ok , i was one of these guys that bought one , i left it in my newer truck , OMG , what a scam , but i did not know about it till i ordered it and look up more things about it online , somebody should shut them down for thinking that this really works . NOT , as i say , Run forest Runnnnn .
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