It's about that time of year for another one of these threads. -5*F this morning. Would you let your car warm up or just get in and drive easy? For conversation sake, let's assume this is a gas vehicle with no block or pan heaters and also kept outside. I'd really like to hear from our northern BITOG members who obviously see much colder temps. I'll start by saying that I am normally in the do not warm up camp, but when it gets this cold, I like to let it run for 10 minutes or so before taking off.