Tiger Woods has been the face of General Motors's (NYSE: GM) Buick brand since 1999, but that's about to change. Faced with increasing competition for leaner overseas competitors, GM has decided it can get more mileage out of Tiger by using him with corporate level marketing, especially OnStar, a navigation service available in all eight of GM's brands.

The change makes perfect sense because it will allow GM to use Woods to sell all its cars, not just Buicks. But I have to disagree with some of the analysis of the decision. According to marketing expert Laura Ries, "The brand personalities just didn't go together, like oil and water," she said. "Buick is an older person's car. Tiger is very young, very cool and at the top of his game. You imagine him driving a Bentley or a Mercedes or a Lexus."

I think that is actually a big part of what made Tiger such an effective spokesman. Let's face it: Youth is in and even if the average age of a Buick driver is 61, I would bet that most Buick drivers don't want to think about that. Using Tiger Woods, who is young and cool, helped to revitalize that brand

As Mark LaNeve, Vice President of North American sales at GM said: "Tiger's a great asset. We can use him in lots of ways. Why shouldn't we use him in ways other than Buick?"

That's why the switch makes sense, and GM needs all the help it can get in remaining relevant.

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