>How long do YOU let your brick warm-up in the winter?
I don't really. In SE Virginia it never really gets that cold, I guess. Even when we're up north conventional wisdom is to start driving and take it slow and easy. Faster warm up, less waste and pollution. Maybe those in Canada disagree...

> i'm interested, too.  also: would your answer change if you only planned to
> drive it for 5 minutes, and then leave it sitting in the cold all day?
Ride a bike :)

If that's not an option, remember that in those 5min you're not going to burn off the moisture in the exhaust, leading to a rust out. BTDT.