Reader questions need to warm sup engine

Wheels:

Brian asks by email: “I have a neighbor who goes outside and starts his truck every morning at 6 a.m. I know this because when the engine starts, his headlights come on and they are pointed right at my bedroom window. The truck runs until he leaves at 6:45, which means that the engine is running all that time. Last year, I talked to him and he said that his father always warmed up the engine before driving it and he has been doing it, too. He even does it in warm weather because he says it sits outside all night and needs to be “woken up” before he drives it. I think it is a waste of gas. Is he right or am I right that today’s vehicles don’t have to be started and allowed to run before driving first thing in the morning.”