Why do you have to wait for a car's engine to warm up before you start driving? What happens if you don't wait and you start driving right away?

Why do you have to wait for a car's engine to warm up before you start driving? What happens if you don't wait and you start driving right away?
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1 Answer

Answer :

I live in the mountains and I never warm up my car. I just start driving. Something bad is probably gonna happen to it in the long-run though.
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