well Bill. I am very interested in your concern on fuel consumption on your RX400H. We bought a Rx400H "07"plate only last week from a Lexus main dealer.We were told a return of 44.8 mpg maximum, though would average around 36 mpg. We have covered 730 miles with a return of 23.5 mpg. We are so gutted!!!!. We feel we have been mis sold