Welcome to the world of SUVs. If you wanted better fuel economy, you shoud have gotten the diesel version.

My old ML320 pretty much ran at 16-17L/100km everyday not matter what. Long highway trips of over 2 hours would drop it down to around 12L/100km, but nothing any better.

Our E320 4Matic wagon runs about 12-15L/100km in the city and 9-11L/100km on the highway, so it is a bit better but not much.

Diesel is the only way to go. If BMW would allow me to have a 3.0d X3, it would be on order tomorrow.