My own madness seems to be spreading like a quiet disease. My girlfriend had a personal best segment on a 200+ mile highway trip in the XC70 yesterday of 30.1mpg indicated. (The fact that she checks these things when I'm not even there impresses me.) She promptly showed her mother, who now wants to know how to do it herself! She drives A LOT and would really benefit from extra fuel economy. Here's the icing on the cake: her daily driver is a Mercedes E300 Turbodiesel. It's heavy but it ought to be hypermiling gold with that engine, especially on the highway. This is great!