I have recently bought a 2007 RX 4ooh with £45k miles on the clock. Having driven fro the UK to The Tirol in Austria at speeds between 70mph and 100mph I find I am getting around 24mpg. (UK miles per gallon) - but its the discrepancy thats the issue.
This is nowhere near the advertised 37mpg and I have no idea what could be causing it. Could the main battery be not performing properly.
Any advice/guidance would be very much appreciated.