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31Do hybrids or diesels reign supreme? Hm. We'll take one of each

We recently reported on a comparison test where Autocar pitted three diesels against a gasoline-powered Alfa and the Honda CR-Z hybrid. The results showed that the diesels were the mileage champs in that test with the CR-Z placing fourth and the gas-fed Alfa in last place. Well, comments poured suggesting that the Toyota Prius would have trounced the competition, which is likely true. It was also noted that the whole test was unfair in many ways, which may be right. Fairness aside, there's sever

13REPORT: EPA planning to address outlandish fuel economy claims of electric cars

The EPA is aware that range-extended electric vehicles can game the current fuel economy test to deliver mileage estimates way up in the stratosphere. It makes for impressive advertising, like General Motors' touting of the Chevrolet Volt's estimated 230 mpg, but the EPA wants to give a more realistic reflection of the fuel efficiency of these types of cars, and it's not alone.

6Hybrids on top of the ten best eco fuel technologies

BusinessCar, a website dedicated to helping businesses get the most for their money when they buy or lease vehicles, has hashed out the pros and cons of ten green automotive technologies. After all the calculations, they've decided that hybrids are the current best choice. The editors say they "judged on emissions (that's all of them, and not just tailpipe CO2), fuel economy, tax benefits, availability and long-term viability – and then crowned a winner."

19Hypermiling your fuel economy ??? The greenest extreme sport for cars

I've observed with mild amusement the recent spate of stories in the mainstream media about fuel saving. Maybe you have too.

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