For every other car I've owned, I've been advised to let the car run for awhile to warm up the engine and get the oil circulating before I drive off in the winter. I'm wondering what holds true for the Prius since when I start it and drive away, it's usually in battery mode. The ICE doesn't usually kick in until I get to the end of a rather long driveway. Is this detrimental in cold weather? Thanks.