Diesel Convert 
2010 BMW X5 Diesel xDrive35d 4dr SUV AWD (3.0L 6cyl Turbodiesel 6A)
If you need an SUV, consider a Diesel
 The 2010 BMW X5 35d (Diesel) has many advantages and very few disadvantages over its gasoline counterparts.  MPG is outstanding (got 30 MPG NY to VA Beach with 4 adults and 600 lb luggage). Torque rivals that of V8 Model.  Main disadvantage is that you can't use biodiesel with a bio content >5%.  Compared to the 3.0 or the 4.8 L version, the diesel is a bargain.  Yeah, it's a little louder than the 3.0, but 35d's sound under full throttle rivals that of the V8 version.  Another downside is that you can't (or couldn't) get the sport package.  Whether it's the X5D or the Audi Q7D, luxury SUV buyers should really consider the advantages in fuel economy w/o loss of performance.