Orillia's bylaw, three-minute limit:
http://www.city.orillia.on.ca/common/Do ... ol_999.pdf
Sure, you can probably convince a JP that you were just idling for winter conditions, but if that's what you were really doing, know that fuel injected cars should NOT be warmed up by idling. Idling is a thing of the past for modern cars, as it was required only for carbureted cars which needed the warmth to maintain proper air-fuel mixture. Idling a fuel injected car has no benefits other than a warm interior for those who don't wear thick enough coats. It unevenly wears the connecting rod bearings, contaminates the oil with unburnt fuel, and does not warm up your transmission, suspension, and wheel bearings. The car also runs in open loop much longer, creating much more emissions and wasting your fuel. Fuel injected cars should be left to "idle" until the initial RPM spike falls to within 500 RPM of idle speed, then warmed up by driving off gently until the temperature needle nears the middle mark. The most important thing to do is to warm up the engine and transmission oils. You can pour 200F engine oil into a -40 engine block and still get the same wear as a warmed up engine. If you have a block heater, plug it in for one hour before your trip for every ten degrees below zero (e.g., three hours for -30 weather). That's my general guideline for a V6 engine, you may have to use longer times for V8s. I keep an outdoor timer in the car to always be able to set the time regardless of location.