I get mine serviced at Sydney City....gets washed each time. Apparently, they offer free washes (without a service)..just need to book in advance.
Haven't used the service.....prefer to wash it myself :P
On the topic of loan cars......a couple of years back, I took the IS in to have the wheels replaced. Since it wasn't officially booked in, the ONLY loan car left was a Camry Vienta!
It was a warmish day....drove to Chatwoods and on the way back to Lexus, it overheated! So the return trip from Chatwoods to the dealer was via a flatbed tow truck ;)