I guess if I think about it the Z is a third car for me too, I've only driven it a few times this year.
The primary/daily/winter car is a 2007 Dinan 335i, which will be getting replaced by a G42 M240i later this year. This 335i has 320,000km, and I actually can't believe it's still running very well.
The secondary car, which is only on summer duty and if the weather is nice is the M5 which I've modified a bit.
