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Published on December 28th, 2013 | by Jo Borrás

9

Putting the FuelShark MPG Enhancer to the Test

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December 28th, 2013 by  

fuelshark

You might have seen a few commercials for the FuelShark lately that promise 10% better fuel economy in all types of cars- new or old, diesel or gas- without doing anything more than plugging a $39.95 widget into your car’s 12V adapter. I’ve tried my sample FuelShark in 3 (three) cars so far, and gotten the same results.

What were the results? For that, you’ll have to read the review, below, which originally appeared on CleanTechnica’s sister site, Gas 2. Enjoy!


Review: Testing the Fuel Shark MPG Enhancer (via Gas 2.0)

For just $39.95, the Fuel Shark promises that you’ll get 10% better fuel economy, better emissions, more horsepower, and a longer battery life- just by plugging a little dongle into your car’s 12V power outlet. Having spent more than few years,…

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About the Author

I've been involved in motorsports and tuning since 1997, and write for a number of blogs in the Important Media network. You can find me on Twitter, Skype (jo.borras) or Google+.



  • Wessiak

    This thing obviously does nothing. There is no scientific reason why it would work. I think you would have figured this out with a better test. A drive in one direction follow by a drive back is, frankly, a horrible test. I regularly drive up to the mountains for my job and get 7 more MPG coming back than going there because going there is majority uphill and coming back is majority downhill. Even if the grade changes aren’t so obvious, you will never get exactly the same MPG going one way on a trip as coming back.

  • James Van Damme

    “Save up to 10% or more…” explain the math on that.
    Other sites have tear-downs of the gadget: it’s a light. Perhaps blue light makes you more economy-conscious? Or perhaps it’s a total scam.

  • actofcourage

    to good to be true…………well
    You can fool some of the people all of the time and all the people some of the time unless it’s guys like you, thanks keep up the good work.

  • http://electrobatics.wordpress.com/ arne-nl

    This is such an obvious scam, that I am unpleasantly surprised that it was featured on cleantechnica. You should utterly ignore this crap. Please stick to reality, it doesn’t merit the free exposure on cleantechnica.com. Even though the verdict is negative, it is still a free ad you’re giving away to these scammers.

    Please skip next time.

    I’m glad you wasted 39,95 on it. Think of all the good things you could have done with it.

    • Altair IV

      I disagree. Fraud thrives on ignorance and misinformation. It needs to be hauled out into the light to really kill it off. The more exposure you give to the lies, the less effective they will be overall.

  • http://MrEnergyCzar.com/ MrEnergyCzar

    As a former hyper-miler, the only ones that work are the devices with an accelerometer built in that beep at you when you’re accelerating too hard or braking too hard… or you can just drive with a full cup of coffee with the lid off and try not to spill it.

  • Omega Centauri

    If you believe in it enough to WANT it to work, you might change your driving enough to actually see some benefit. The placebo effect giving you a light foot?

  • Matt

    “save UPTO 10%” which means at most 10%, you saved ~0% which is in that range.

  • Onno Westerman

    This thingy can not do anything for its sit just in the sigar outlet of the car which is connected to the electrical system and the accu. It is just a lamp .

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