Do Fuel Saving Gadgets Actually Work? – Fifth Gear

Jonny gets scientific to test fuel saving miracle

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Comment (32)

  1. "in it's defence the makers claim you need to cover 2000 miles before seeing any benefit". um i'm pretty sure that's just to stop people returning this shit after they realize they've been had. not to mention any device that intercepts the fuel before it hits the engine would have immediate effect, you know, considering any fuel that goes in is gone forever.

  2. Bs.how do we know the magnets are arranged in the correct magnetic polarit?knockoffs fakes and counterfeit are marketed as the real thing.magnets work only if the magnetic fields are arranged correctly.

  3. my theory is control temperature of air intake and then you save 50%in the coldest winter in canada, summer save 25 in the warming up period when you drive only short distance

  4. The best fuel saving device I know (and it's the best by far) is a light right foot. I could get over 51mpg out of a bone stock 1.3-litre Honda Jazz (manual transmission) using that.

  5. My prototype allows me to advance the timing without knock.

    The Youtube video shows it working.

    It needs more testing of course.

    By reducing knock and pinging you can lean out air/fuel mixture.

    When you run ultra lean air fuel mixture, you will need to cool the engine by using water or water/Meth injection constantly.

  6. I'm using several fuel saving things. I save so much fuel I have to drain fuel from the tank, otherwise it starts pouring out from the filler cap as I'm driving!

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