My 2010 RX450h has 45k on it now so obviously I don't leave it parked often. But I have for up to 3 weeks when out of town. Was not a problem. If you've never been in the http://www.clublexus.com/ forums, drop in for a look around, there is a lot more activity and information re: RX hybrids. Not saying anything bad about this forum, it just doesn't have the population C/L does. But along with what others have said, as long as you drive a reasonable distance (when you do drive it) you should be just fine.