I always remember the old saying Hurtz. If at first you don't succeed, then skydiving's not for you!
Like Bobby I can't see the sense in it, but then again there isn't much sense in going round and round a race-track, but my life would've been a lot poorer without it.
I remember doing my private pilots licence training, I said to the instructor do these things crash often. She replied with only once normally! That put my mind at rest!
As for the original question, my car only does 12mpg if I boot it so.......
The biggest change in my life was walking to work etc, so nearly all my mileage was recreational.