I live in a hilly terrain - daily commute is 40 miles RT. The current programming is over-zealous in keeping the battery filled up via ICE. There is so much opportunity for regenerative breaking (and thus saving LOTS of MPGs for me) that is wasted. Of course Toyota had to make a program that would sort of reflect "typical" driving conditions. But for me, it is not making best use of the awesome technology. I don't want to do anything unsafe or violate the warranty, but does anybody know if there is any kind of third-party "tuning" available - or even better - has Toyota considered providing more than one sanctioned programming so different ones of us can select a program better suited to our needs?