I maintain a site called www.MetroMPG.com which I use to describe the car to others who may be considering getting one of these fuel economy leaders, as well as document economy mods, efficiency driving tips (used to be an instructor while I was in school) and info about fuel efficiency in general.
But by far the single largest contributor to improved fuel economy is driving technique.
- test Aitabs
- permanent partial Kammback
- electrically driven water pump
- front wheel skirts
- wheel spats/deflectors
- would love to experiment with a removable and/or inflatable boat tail
- EGR mods (?)