Eight Facts About Warming Up Your Car in Winter

  Old habits die hard, and one of the oldest — still rigorously enforced by many drivers — is that "warming up" the car for a few minutes is necessary to avoid some kind of unspecified damage. But idling is totally unnecessary, which is why many communities have enacted ordinances against the practice. Don't take my word about idling being ineffective, but do listen to my mechanic, Rob Maier,