- 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 Specifications
Product Information
BrandFuel Doctor
Manufacturer Part NumberFuel Doctor
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.
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Customer Reviews
Most Helpful Customer Reviews
84 of 89 people found the following review helpful
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.
75 of 81 people found the following review helpful
Amazon 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!
44 of 48 people found the following review helpful
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.
Most Recent Customer Reviews
This is ridicouleous
This product has zero effect on the vehicle electrical system simply because it is placed at the very end of the electrical circuit in the power plug. Read more
Published 7 months ago by F. Delor
REAL WORLD, ACTUAL USE, UNBIASED REVIEW
Most reviews here are either manufacturer shills or ego maniacs who have never held this product in their own hands. Read more
Published 8 months ago by All American Mall
Pure and simple FRAUD
If I could give minus stars it would be -5. This thing is junk. Pure and simple fraud. Use the money to buy more gas for your car. It will do more for you that way. Read more
Published 10 months ago by Jim Shanklin
Hoax
This device is a complete scam. The only thing the Fuel Doctor does is light up, it's nothing more than a $50 LED light.
Published 11 months ago by Bryan Putzke
One star is more than it's worth
I read an article on fuel savers and decided to check a few out. This one was the most prominent. Consumer Reports panned it as worthless. Read more
Published 11 months ago by RWC-PSI
People please, read this before you spend your money on this thing
Fuel Doctor FD-47 was taken apart and the circuit was analized.
Basically it is a simple circuit board with only one fuction: to turn on a green light when plugged into... Read more
Basically it is a simple circuit board with only one fuction: to turn on a green light when plugged into... Read more
Published 11 months ago by Jorge Gomez
GARBAGE
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. Read more
Published 12 months ago by Michael W. Edmonson
AMAZING PRODUCT
This product helps me so much. I go to San Fransisco every month and i have a ford f150. I used to fill up right before i got there because i would be so low. Read more
Published 12 months ago by dt
a complete hoax
it simply a hoax, don't be fooled!, if the technology so good, all car manufacture must already implemented in their cars. Read more
Published 13 months ago by San San Lim
I cant believe The Fuel Doctor works so well!... But it does!
I Purchased the FD47 from Walgreen's.com a few months ago, i figured I would give this thing a try. I saw the video posted on line and I figured i would buy one @ $59.95. Read more
Published 14 months ago by Aljca
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