Well, it is your car, and it was out in the garage all night. Warming up your car isn't essential unless it is a 30-year old vehicle that hiccups as you drive. For less than 30-year old or newer cars, you only need to give it 30 seconds or so. Don't just start it and get it out on the road. In the winter season, you need to be patient so that you don't freeze when you step inside it. Drive it out of the garage and turn on the defroster and the engine. Let the engine run for at least 30 seconds. If your car is out in the open and it is covered in snow, remove the snow and let it run for almost a minute or so. Then step in and start it. Drive slow for the first 5 to15 minutes so that the engine has time to warm up properly.