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Let's say you own a hybrid vehicle that meets most of your driving needs. This hypothetical auto tackles the daily grind with ease, seats four or five, is reliable and gets you to-and-fro without any issues. Trouble is, you're less than thrilled with its overall gas mileage – or maybe you'd just like to extend its electric-only range (or create one). Well, Vista Engineering Technologies (VET) might have a deal for you. For less than $10,000, the company will convert your existing gas-elec

With 10.2 million fleet vehicles in use in the U.S., innovative start-up company Alte saw a market opportunity to develop a plug-in hybrid conversion that would transform the nation's inefficient vehicles into the fleet of the future. The company, founded less than two short years ago, hopes to convert 500,000 fleet vehicles over to extended-range plug-in hybrids in the next six years. While conversions are quite a regular occurrence, Alte offers something that most don't: a 50,000 mile powertra

Converted plug-in Prius – Click above for high-res image gallery

Fedex has been on the leading edge of testing and deploying various alternative fuel delivery trucks for several years and has now expanded its fleet of hybrid delivery vans by 50 percent. This time, instead of buying new hybrid vehicles, it has retrofitted 92 older vehicles with new powertrains. The newly-converted vehicles were originally built in 2000 and 2001 and have accumulated 300,000-500,000 miles. They also had diesel engines that pre-date the 2007 emissions regulations and didn't have