At or under 1500 rpm on the highway - cruise and eco pro on. Music at 11. Gives 55+mpg (UK gals) for a straight six diesel. At 70+ I was struggling to get 50+ mpg out of a Prius though others claimed nearer 65mpg.
For twisties sport + on, auto to manual, music off, change up at just before 5.4k. ASD kicks in
Mpg drops to just over 30mpg ... But
