Given the higher price of fuel and car I am not sure Diesel is the way to go.

I don't understand why they don't put the 335 gas engine in the X?
It has tons of torch, on a recent trip to VT (in the 535XIT) it went up the hills in high gear with ton of power. The old 4.4 X5 had to down shift to climb those same hills.

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Loving my BMW