Being shown at the Clean Vehicle Technology Expo in Ontario, California is Hymotion's modified Prius that can hit up to 150MPG in city areas. By adding a 175 pound battery pack to the trunk of a Prius -- which fits conveniently under the floor panel -- and charging overnight using a regular power plug, owners will be able to drive for up to 50 miles on battery power alone: that's well over the average motorist's daily journey. It'll cost $9,500 including installation, but according to one of the staff at the show, half of that could be covered by rebates as part of a new electric cars bill soon to be before Congress. Onwards we go, tip toeing towards a petrol-free future.

[Thanks, I LOVE THE CAPS LOCK KEY]

While we've seen everything from brilliant engineering to run-of-the-mill hacks enable vehicles to squeeze every last inch out of a tank of fuel, it looks like the Senate is taking larger strides in order to raise the MPG bar. The US Senate has reportedly passed an energy bill that would raise fuel efficiency standards to an average of 35 miles-per-gallon, create additional provisions that make it unlawful to charge "unconscionably excessive" prices for oil products, and establish new appliance and lighting efficiency standards to accelerate the use of more efficient lighting in public buildings. Lastly, there was purportedly verbiage that provided "grants, loan guarantees, and other assistance to promote research into fuel efficient vehicles." Of course, the bill still has quite a ways to go before it gets set in stone, and while upping the standard sure seems novel, a quick glance around existing lots will show that quite a few whips sold today aren't quite living up to the 22.7 mpg standard that's already in place.

[Via Digg, image courtesy of MPGStickers]

No doubt, we've seen more than a few sensational sounding gizmos aiming to provide (nearly) limitless power and create energy out of thin air, but a simple software patch could enable the vast majority of the world that's still stuck in gasoline-powered vehicles to get better gas mileage. John Kessels at the University of Eindhoven has partnered with Ford to develop software to improve engine performance and save "up to 2.6-percent" in terms of miles per gallon. Quite simply, the patch dynamically switches the dynamo, (which charges the car battery) on and off when it is "particularly inefficient for the engine to power it, thus improving the overall efficiency of the engine." Mr. Kessels even stated that "a simple cable and a software upgrade" was all that would be necessary to boost MPG, and thankfully it's not exclusive to Ford motors. Notably, a fuel savings closer to six-percent could likely be achieved if a "powerful starter motor" was installed to allow your engine to cut off entirely and restart quickly in between long traffic jams, but both methods have a good bit of testing to go through before being deemed non-abrasive to batteries and engine components. But hey, there's nothing a firmware upgrade can't fix, right?

Nothing, we mean nothing, says success like rollin' in a big fat Hummer eh sparky? Only thing is, you can't stand the thought of those accusatory stares from your fellow highwaymen as you lumber along sucking-up fuel. Well, we guess you never heard of the Mileage Maximizer then? Don't sweat it, 'cause two friendly Detroit, rock city Hummer dealerships have, and they'll happily sell you the $190 wonder mod while touting its 30% increase in fuel efficiency. The promotion has been so successful at selling new Hummers in fact, that these boys are now considering expanding the modification to more stores and vehicles. Sure, GM and Hummer officials don't endorse the application of the "Vortex Valve" to the vehicle's intake manifold and may not even honor warranties. And just you never mind that no one will stand by those unofficial claims of increased efficiency or that tampering with the emission controls on EPA certified vehicles is, ehem, illegal. You go right on feeling better about yourself... after all, you tried, right?