4.8 vs 3.0 gas mileage debate

[jochet]

Now, I know us guys are not buying a BMW because it's got great gas mileage, it's still something to consider. I believe the 4.8 will get almost as good mileage as the 3.0. The X5 is no light weight and either car driven hard will eat up the gallons. When I had my 04 3.0 it only averaged 17 MPG, but if driven hard which somtimes was not an option, she would get only 15MPG. I know the 07s are lighter, have more efficent engines and have 6 speed transmissions I still don't believe either engine will average more than 20MPH. The big difference is cost, the 4.8 is expensive, especially if well equipted. JMO