Surely you're hip to the Diet Coke and Mentos phenomenon of a few years ago. When an enterprising duo realized that the hard-coated candies interacted with the soda in an explosive way, an internet meme was instantly born. Over the last couple of years, though, interest in the parlor trick seemed to wane. Until now.

Fritz Grobe and Stephen Voltz, the two men who helped kick off the fun in the first place, are back, claiming a new record for the longest distance traveled in a car powered by Diet Coke and Mentos: 239 feet.

No, that doesn't seem very far to us, either, though Mark II of their machine is a marked improvement over Mark I. The Mark II vehicle is more aerodynamic and seems to have less mass than its predecessor, which positioned the rider way out in front over a bicycle-like contraption. That said, we think Grobe and Voltz do even better... especially since they used just half the fuel this time 'round.

After dissecting the video, we believe there's a lot more power in the Diet Coke and Mentos recipe to be had, and there must be a better way to stop so much of the fuel from leaking out instead of providing forward thrust. Duct tape, perhaps?

Until they try again with Mark III, feel free to check out the latest Diet Coke and Mentos-powered car in the video after the break.



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  • 27 Comments
      ShutoSteve
      • 3 Years Ago
      Ok, but what's it's ring time!
      Jonathan Arena
      • 3 Years Ago
      You need to fit some sort of nozzle on the bottles to make the spray come out with more force.
      • 3 Years Ago
      [blocked]
        bomgd3
        • 3 Years Ago
        How can artificial sweeteners not work to reduce weight if they have no calories vs. 100-200 kcal of a soft drink? I didn't know they defied physics.
          Maverick
          • 3 Years Ago
          @bomgd3
          When an artificial sweetener hits your system, your body still reacts to it as sugar, so it floods your blood with insulin, which in turn triggers fat storage.
          MikeSVT
          • 3 Years Ago
          @bomgd3
          This is simply not true, especially with Aspartame, the sweetener in question here. Sources: http://home.comcast.net/~mdgiovinazzo/Malaisse-1998-EffectsOfArtificialSweeteners.pdf http://onlinelibrary.wiley.com/doi/10.1111/j.1600-0773.1991.tb01262.x/abstract http://care.diabetesjournals.org/content/11/3/230.short And here's a good summary in laymans terms if you're interested, for fellow diabetics http://www.marksdailyapple.com/artificial-sweeteners-insulin/
        IBx27
        • 3 Years Ago
        I see you used huffington post as your source.
          • 3 Years Ago
          @IBx27
          [blocked]
        dej
        • 3 Years Ago
        Funny how in the years since with 2 Dem. presidents and many years of Congress having 1 or both houses controlled by Dems. that someone would have righted this wrong.
        me
        • 3 Years Ago
        They do work, the fatties would be even fatter if their drinks were sweetened with sugar.
          • 3 Years Ago
          @me
          [blocked]
      matin G
      • 3 Years Ago
      Whats with the stupid outfit and goggles? What wimps we have become as a society. When I grew up in the 60's we did all kinds of stuff with no safety gear and no one ever got hurt. Just the other day, my daughter got my 4 year old grand child ready for skiing. when he came down the stairs, he looked like a robot with all the padding, jackets, helmets, goggles and shields. The kid couldn't move!
        adrive7
        • 3 Years Ago
        @matin G
        You mean the lab coat and lab goggles? They're supposed to be scientists, and the videos are supposed to be ridiculous. Chill out.
        bomgd3
        • 3 Years Ago
        @matin G
        I'm Td'ing you for not having a sense of humor. Do you chase kids off your lawn?
        Carphanatik
        • 3 Years Ago
        @matin G
        You go ahead and get Diet Coke in your eyes, I'll take the goggles.
        goetzcr
        • 3 Years Ago
        @matin G
        It's a joke, Howdy. Relax.
      Miguro Takahashi
      • 3 Years Ago
      Autoblog is the TopGear of car websites. They'll report on anything and everything and most of the time you can't take them too seriously. This is a prime example of why.
        Carphanatik
        • 3 Years Ago
        @Miguro Takahashi
        Well Mr. Takahashi, if that is your real name, you must still like it if you took the time to click on the link, watch the video (don't deny it, you know you watched it) and then comment on it. Why does everything have to be serious?
      eliotsmeliot
      • 3 Years Ago
      I wonder if it would be more efficient to harness the power to push a piston rather than through direct propulsion. Instead of gas and a spark plug, you use diet coke and mentos.
        Maverick
        • 3 Years Ago
        @eliotsmeliot
        If you could seal the system completely, I think that actually would be ideal, except it would be more similar to an external combustion engine. Instead of using pressurized steam generated by a fire and a tank of water, you use the expanding CO2 from the soda.
        DrEvil
        • 3 Years Ago
        @eliotsmeliot
        Why push a piston, and not some sort of turbine or wheel, more efficient.
        Geraint Owen
        • 3 Years Ago
        @eliotsmeliot
        would adding an extra layer of friction help? I dunno. Pushing more fuel through quicker and working on the wheel bearings might help too.
      Autothoughts
      • 3 Years Ago
      Impressive gains in efficiency over Mark I... They need a second gear as they lose all power transfer after they leave the wall. I like the "manual direct injection" they use as well.
      whitejohnh
      • 3 Years Ago
      No, I haven't heard of the mentos/diet coke phenom.
      Tristan Tandberg
      • 2 Years Ago
      haha great, Here is a funny joke I saw about coke, http://ponderingstuff.com/2012/02/01/we-need-to-force-coke-to-patent-its-drink-formula/
      BipDBo
      • 3 Years Ago
      At launch, something that looks like a ramp appears out of nowhere.
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