Benebob is correct. Today's ( & most of yesterday's ) cars don't need any elaborate warm-up ceremony. As long as the engine isn't "raced" after start up, summer or winter, a few minutes of "gentle" driving is better than 5 minutes of steady driveway idling. The reason, I believe, is that ALL the driveline components should be gradually warmed, not just the engine. However, it's probably wise to avoid burnouts until the car is fully warmed.
Ron (spoiled by a garage).
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Good s**t happened.  69 was worth the wait.
'92 stock semi-pristine ebony - 160K
'96 Grand Caravan - 240K
'01 Miata SE - 79K
'07 Chrysler Pacifica - 60k - future money pit.
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