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Old 11-25-2009, 03:18 PM   #96 (permalink)
Efficiency freak
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Join Date: Mar 2008
Location: Berlin, Germany
Posts: 58

Frugolf - '96 VW Golf wagon
90 day: 40.36 mpg (US)
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My 2 Eurocents worth:
In Germany diesel has almost always been *cheaper* than gasoline, because it's subject to less fuel tax (presumably to help the truckers). As a result, people are buying diesels like mad, even in the smallest cars, despite higher purchase prices and higher vehicle taxes. As a result, demand for diesel is increasing and, because you can only get a certain amount of diesel out of a gallon of crude, the price disparity has recently been whittling down.
Diesel engines are inherently more efficient (something like 35% vs. 29%), but NOx and particulate emissions remain a problem. The latter is being addressed by particle filters, which fortunately are being delivered in most new diesel cars.

You ever notice that birds pulse & glide, too?
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