Yup, very true - not only is the RX a big, heavy 4x4, it's also a big, heavy, FAST, COMFORTABLE 4x4.
My previous Hyundai Santa Fe was a 2 litre diesel and did slightly better mpg BUT it was dull as ditchwater to drive and far more un-refined.
If you want fuel economy, go small hybrid...you cannae change the Laws of Physics, Jim...
EDIT: sorry, just realised I pretty much repeated everything javadude said....sorry... :eerrrmm: