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Old 02-02-2011, 09:20 PM   #48 (permalink)
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,316

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.07 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)
Thanks: 3,846
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Fuel Doctor FD-47 fails the Consumer Reports mpg test

When we put it through our extensive testing on a number of vehicles, we found that it made no significant difference in any evaluation. As far as we can tell, all it does is light up when it’s plugged in.

We tested two samples of the FD-47 on 10 vehicles, with different types of engines, including four-cylinder models, standard and turbocharged V6s, and gas and turbodiesel-powered V8s. We ran each vehicle through our standard series of acceleration and fuel-economy tests, and the results were virtually the same with or without the device. The company says that the Fuel Doctor is recommended for use on vehicles 24 months old and older but that positive effects can be expected on many newer vehicles as well. Two of our test vehicles were older than 24 months.

In the past, we’ve tested bolt-on devices that were claimed to provide big fueleconomy and performance improvements, including the Fuel Genie, Platinum Gas Saver, and Tornado Fuel Saver. But we have yet to find one that makes a significant difference.

Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown

has launched a forum for the efficient new Mitsubishi Mirage - fuel efficiency info for Geo Metro owners - electric car conversion on a beer budget
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