 I waited 6 months to write a review of the turbodiesel X5 to make sure that there would be no issues with the engine. There aren't any issues with the diesel - its great! Plenty of power on the low end with good power at speed. The six cylinder gas engine is way underpowered. The V8 has great performance with terrible fuel economy. I am getting between 30 and 32 MPG on the highway and 18 MPG in local driving. Figure that you will average 22 MPG in combined driving.