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Gas-guzzler commonly refers to a vehicle that consumes fuel inefficiently. The term originally came into use in the US when congress established Gas Guzzler Tax provisions in the Energy Tax Act of 1978 to discourage the production and purchase of fuel-inefficient vehicles. The gas guzzler tax had applied only to cars (not trucks) and was collected by the IRS.〔http://www.epa.gov/fueleconomy/guzzler/index.htm〕 Other countries have followed suit and introduced their own version of a gas-guzzler tax such as Canada's "green levy". The term extends to all fuel-inefficient vehicles, from antiquated V8 American classics to Italian-bred sports cars. A Lamborghini Murciélago, a Plymouth Roadrunner, and a Hummer H1 might all be classified as gas-guzzlers, though they are very different cars. == Reasons for bad fuel economy == There are several reasons for bad fuel economy in cars, vans and trucks: * Heavy weight: A heavy vehicle requires more work to accelerate than a lighter vehicle, requiring more powerful (larger displacement) engine with higher fuel consumption to achieve a similar power-to-weight ratio. * Large drag coefficient: A less aerodynamic vehicle must deflect a greater volume of air when moving at the same speed than a more aerodynamic one. To overcome this drag, a more powerful engine with higher fuel consumption is needed. * Higher Power: A car with a bigger, more powerful engine will have a bigger displacement and use more fuel in the process. * Non-Daily use specialty vehicles: Some cars are not designed primarily for daily, mainstream use such as commuting but for other purposes in which impact of fuel economy is negligible. For example, a sports car designed for a limited amount of recreational use would have handling and driver satisfaction as a main focus instead of fuel economy. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Gas-guzzler」の詳細全文を読む スポンサード リンク
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