Yahoo Autos 
Biggest Gas Guzzlers
Typically the bigger the autos and the higher their performance, the more gas they’re going to need. That’s not considered a good thing in these enlightened times, on a planet with a finite supply of fossil fuels. Hence, numerous organizations keep track of which vehicles require the most juice, and they publish lists of the best performers and worst offenders.
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Two such organizations supplied lists and information for this collection of the latest and not-so-greatest gas guzzlers: Edmunds.com and the American Council for an Energy-Efficient Economy. The council provided its 2011 Meanest Vehicles for the Environment list. Edmunds.com, in addition to fuel economy, takes into account emissions and other factors.
To give more depth of perspective, Edmunds.com, used official EPA fuel economy numbers for combined city and highway driving, and current national-average fuel prices from AAA to determine a monthly fuel cost for the vehicles on their list (assuming 1,250 miles driven monthly). See which specific makes and models are guilty as guzzlers.
Mercedes-Benz M-Class ML63 AMG
MPG city: 11
MPG highway: 15
The 2011 Mercedes-Benz M-Class ML63 AMG midsize SUV (pictured here) costs $400 a month to run on premium gas, and so does the Mercedes-Benz G-Class G55 AMGfull-size SUV with off-roading capability, says Edmunds. The Mercedes-Benz G-Class G550 SUV with off-roading capability costs $369 per month to run on premium gas.
Chevrolet Express G2500
MPG city: 10
MPG highway: 16
The 2011 and 2012 Chevrolet Express G2500, pictured here, costs $373 per month to drive using regular gas, according to Edmunds.com. Another model from Chevrolet G2500, also makes the list with 13 miles per gallon city and 18 miles per gallon highway.
Lincoln Navigator
MPG city: 13
MPG highway: 18
The Lincoln Navigator (FFV) sport utility vehicle earned a slot on ACEEE’s 2011 Meanest Vehicles for the Environment list, and not for the first time.
Lexus LFA
