Well I haven't driven mine apart from on and off the trailer since the end of 2000. I start it up every month or so just to get the oil moving around (and to hear it run!). I just can't find the time these days and those niggly little jobs just don't get done.
What's worse I've got a Z-car which is a work in progress (also started up every month, much to the neighbours' disgust) and like Will, I'm the first owner not to park my 1600 in a garage, and I'm watching it deteriorate too. Almost criminal really.