www.edmunds.com If the idea of a diesel-powered sedan like the new BMW 335d is too hard to swallow, maybe the 2009 BMW X5 diesel will make more sense to you. After all, it weighs 2.5 tons, so it could use a little extra engine torque. And it's a truck, sort of, so you won't look nearly as silly when you pull up to a pump at Big John's 24-hour Truck Spa on your next road trip. Then again, the real draw of diesel engines is the fact that you don't have to stop for fuel as often, and the 2009 BMW X5 xDrive35d (as it's so clumsily named) delivers on this promise, at least according to its preliminary mileage estimates. At 19 mpg city and 25 mpg highway, the diesel X5 easily tops the standard X5 3.0si with its 3.0-liter inline-6 gasoline engine rated at 15 mpg city and 21 mpg highway.
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