aero blades more fragile?

[Brendan]

> As for leaving the car running to warm up, it's not recommended by
> most car companies.  Accelerates engine wear quite a bit to have the
> engine idle so long (driving generates much more heat and the engine
> warms up faster.)  Dunno about Audi, but Volvo sells auxiliary heaters
> that crank out a large amount of heat to warm up the engine and
> coolant.  I don't think they are available in the US, though :(
> 
>   In MA, though it is almost never enforced, there's also an
> anti-idling law that was mostly aimed at diesel trucks, but applies to
> all vehicles.  I know NYC has a similar rule...a number of states
> probably have similar laws.

Blah to both.

So, when I am idling in traffic, that accelerates engine wear? Shucks, I'll 
have to tell that to my two 300k+/mi cars that have both been idled every 
winter for 20 winters and idled in traffic 5 days a week for 20 years...