着个10-20秒再动车，只是不要马上风驰电掣即可，夏天5-10秒，个人之见供参考！

CarTalk: Do cars need to warm up, on cold winter mornings?


TOM: AND, to make up for all the misplaced grief he's given you over
the years, he needs to start going to bed 10 minutes before you do, to
warm up the bed for you on cold winter nights. That's a warm-up
activity he can do that's actually useful!



Yahoo auto: 8 facts and myths about warming your car up in winter