Minus degrees – hot running for how long?

Hello together, who drives with his scooter in winter? That’s a small question. Today I had a discussion, that I should run a 2 bar scooter at minus degrees at least 2 minutes even up to 5 minutes. Warm running, so to speak. I don’t do that until then. I start my scooter, wait for the speed to level up and go. I always had a 4 bar scooter in winter until now. It didn’t matter. Is that not okay with 2 clocks anymore?