Gas needs to be an afterthought if you purchase the X5 or the X6 with the V8TT. They were built with performance in mind, not gas mileage. If you are worried about affording the gas on a $100,000.00 car, you are a very conflicted individual. I apologize if the previous sentence insulted you, I didn't mean for it to be insulting. If, in fact, you can afford the fuel, but you are trying to be responsible, you need to ask yourself what is inherently responsible about a 550HP Suv?
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