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Thread: New car product: saves miles?

  1. #1
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    New car product: saves miles?

    New car product, fuel doctor usa, saves miles. I'm still skeptical on this new device and if I should invest in the 69.99 price of it. Just wondering if anyone out there has used it and has a good experience with it.

  2. #2
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    Quote Originally Posted by fueldoctorusa.com
    The Fuel Doctor FD-47 increases a vehicle’s miles per gallon (MPG) through power conditioning of the vehicle’s electrical systems. Conditioned and clean power allows the vehicle’s electronic control unit (ECU), fuel injection and engine timing equipment to operate more efficiently. More....
    Based on that, all I can say is what a load of farken sht!

    It's the equivalent of balance rings for CDs & DVDs.

    I was expecting at least some fuel polariser or turbulator.

  3. #3
    MySQL Error soundman98's Avatar
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    Quote Originally Posted by one user comment
    I have a pilot/escort company so we travel all over the U.S. My 2008 Chevrolet 1500 w/5.7 at high speed (70-80) normally gets 13-14. With the doctor I get 16-17!
    so you would be paying nearly $60 for a device that would save approximately 2 miles per gallon..

    i don't want to do the math, but that doesn't seem like much of a increase for a $60 device..

    i don't remember where i read it, (it could have been in mythbusters), but there is some theories that say that just have a "fuel-saving" device in your vehicle--weather or not the device really saves any amount of fuel, a device like this makes you more conscious of your driving habits-- which could account for the +2/3 mpg increase in the reviewers statements..

    just slowing down to a red light, and not punching it at a green light could account for the mpg increase.. or maybe they filled up their tires to the correct pressure...


    but look at it from a manufacturer standpoint--

    remember, all the makers are starting to feel the heat of new vehicle mileage requirements that are set to take hold in 2016...

    if this device truly saved 2-3mpg in all cars, all manufacturers would jump on that, and would include it with the car, why would it even be offered to be used as a aftermarket device?

  4. #4
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    The math usually does win if the claim is true - even at 1 mpg extra.
    (I know even costly engine rebuilds are often "cheaper" than low compression or oil burning - depending on your payback horizon or cash flow.)


    But your reasoning is sound. Gone are the days when car manufacturers canned fuel saving devices.
    And though there are some techniques, turbulence in fuel lines etc?? - NOT for $20!!
    (And not that I trust MythBusters anyhow - they have disproved so many still-facts and done some many illogical tests, or mis-tested by not reproducing correctly...)


    But I see the IMO obvious in this case (LOL - obviously!)
    Smoothing the supply improves economy HOW?
    An external smoother smooths the ECU internals HOW?
    A remotely mounted cig-socket accessory does this HOW?
    (Will the next model be mounted across the alternator? The next across the battery? And finally across the EMS? 4 generations starting at $60...)

    Geez - maybe a surge tank would have a greater smoothing effect?


    Then there are the classic bullsh statements, like:
    "...it flattens out the noise down to the actual vehicle voltage." (Not "up to"?) and...
    "All measurements, readings, settings, time and date reflected on the display are original and not altered" ...since their original construction. (They are not real pics!) (What dates etc?)

    Not that the pics explain where the readings are taken, but I can tell that a small cap will filter that noise out.

    I wonder if we are dealing with an active filter (as used for mans/AC filtering & conditioning) or a simple hi-frequency filter (aka - a small capacitor).

    Logic - NONE!

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    Logic - this is bulls*@$ Like Chip on ebay at 20$ increase 50HP and reduce MPG... F-A-K-E...

  6. #6
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    Quote Originally Posted by InsaneQc View Post
    Logic - this is bulls*@$ Like Chip on ebay at 20$ increase 50HP and reduce MPG... F-A-K-E...
    those are easier to explain how they work then this newer device..

    all the kits are is a resistor that gets connected across the MAS(mass airflow sensor--i believe the other term is MAF, but can't remember what it stands for).

    the MAS generates a different resistance based on the amount of airflow coming into the motor.

    by connecting a resistor in-line with the MAS wires, you are changing the resistance value that the cars computer(ECU) reads as the airflow coming into the motor, typically, this resistor fools the ECU into thinking there is more air then there really is.. this results in the ECU sending more fuel into the motor to get what the ECU believes to be a correct mixture, when the reality is that it is sending more fuel into the motor then the motor really requires...

    this all results in 'better power' at the Butt-dyno, at the obvious cost of fuel economy, and possible long-term engine damage...(more fuel means more heat, and more wear on certain components)

    but suffice it to say, any vehicle engine mod that includes portions of double-stick tape, and zip-ties is probably not worth your time...


    the tough part about all of this is that when things are in a nice pretty plug-n-play package like the fuel doctor, many people buy them because they don't need to open the hood(i would be interested to find out how many people even know where their hood-release is...), and all the sneaky marketing lingo "says it will help with my gas mileage!!"
    Last edited by soundman98; 03-02-2011 at 08:11 PM.

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    Soundman you're right, this make your car running with higher A/F ratio makes the engine running too rich .. this may cause few troubles.. as o2 Sensor and killing your First Cat.. This may cause Backfire too.. and trust me your Intake and the exhaust Does'nt like Backfire .. SO don't buy this

    But w/e this ain't a Tuning/Engine Forum

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    agreed, but for anyone looking at getting more power/better mpg out of their motor, i consider it critical info for them to read-- no matter where it comes from. at the very least, i think it is critical that everyone understand that components like this have a huge potential to ruin more things then they help.

    while you and i might fully understand the ramifications of installing such a device, the prevalence of the 'kits' on ebay suggests that many people do not understand the points that have been made in this thread, and the detrimental effect on engine components, so i don't mind posting it in a non-engine thread..

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    Yeah to be honnest , I would explain it in detail the consequence theses device may have to your engine but I speak french and my english is not perfect

  10. #10
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    The Fuel Doctor will not damage your engine.
    All it will do is chew up a bit of extra fuel because it consumes power.
    It does little else.

    The AFM/MAF resistors are old hat and can increase or decrease fuel economy (or inversely power) depending on the system.

    Usually only a leaner mixture will overheat and destroy the engine.
    Richer can kill the cat & O2 sensors.


    As to people needing to read "valuable information" about devices like the Fuel Doctor etc, sorry guys - you won't help.
    People will by the latest momentum of gravity exercise machines or bagless vacuum cleaners even when they have self-contradictory ads. (Even I can lift an elephant with my sucking power - and I don't use anywhere near the 2kW that vacs use!)

    If people accept the claims and reports on the selling sites themselves, well so be it. Not that the Fuel Quack has any "reports". (I recently mentioned Frank Zappa and his "Flakes" - I am a moron and this is my wife....)


    Or are they real reports?
    Strange that they state injection time without stating fuel pressure. (Note - lean mixture kill engines! WARNING!!)
    And the Fuel Doctor "smooths out" electrical noise, yet the waveform measurement (with smaller U factor) clearly shows INCREASED frequency of ripple.

    As to manufacturers have and use the technology, but the electrics "change" with time....
    So the manufacturers "system" is not adaptive, yet here comes the Fuel Doctor that is? You can even swap it from vehicle to vehicle regardless of type & age? No resetting required?
    Wow - unlike aftermarket fuel injection systems, the aftermarket fuel enhancers really have surpassed the OEM stuff!

    Ah yes, I see how very hitek it is.....


    I like Melissa's post: (November 9, 2010 at 12:25 pm - from here.)
    "I saw this Fuel Doctor FD-47 in a magazine. I am a GIRL and even I know this is a bunch of BS......
    I looked it up today to see how many people had complained about their purchase. Just as I suspected. Almost everybody.
    Some people will believe anything and shame on this company to take advantage of people. They are laughing all the way to the bank ! Buyer beware.
    ".

    Should I go on?
    The Fuel Doctor FD-47 Is More Of A Fuel-Savings Quack
    What does it do ? (with the circuit circuit - note the capacitor-inductor error!)
    FD Manufacturing

    What next, capacitors that store voltage instead of current for audio systems?

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