Should You Warm up Your Engine by Letting Your Car Idle in the Winter?

I called half a dozen mechanics across half a dozen states and got recommendations that ranged from 0 seconds to 10 minutes.

Warming up your car in cold weather can damage the engine

Warming Up Your Car On a Cold Day: Myths vs. Facts

Rochester NY Weather: Should you let car warm up in cold weather?

How long should you allow for your vehicle's engine to warm up

Do you need to let your car idle and warm up in winter?

Should I warm up my car in winter? Some cold weather tips

Warming up your car in cold weather can cause engine damage

Winter car prep: A mechanic's advice on getting your vehicle ready

Do I need to let my car warm up in winter?

Let there be heat: How long should you plug in your car, car plug