Why do some cars have “steam” coming out of their exhaust when it’s cold but others don’t?

Question

I was at a stoplight, the outside temp was around 35° F but only one car had steam coming from their exhaust pipe. Every car is “hot” as the engine is running and I don’t understand why every car doesn’t.

In: Other

Answer 1

Mine starts each morning with that stream. I start driving before it goes away completely, but by the time I’m at work it’s gone. Just because an engine is running didn’t mean completely hot yet