
I suppose part of Buick's rating could be because their average owner (who is 65) tends to take excellent care of their vehicles and not push them too hard (though the average Lexus owner is less than a decade younger), though on the other hand Lexuses tend to incorporate Toyota's latest technological goodies, while Buicks tend to use GM's older, more proven hardware. Then again, Cadillacs tend to get GM's latest hardware, and they made it to second place.
On the subject of how cars are driven affecting reliability, note how low Toyota's Scion brand is compared to Toyota and Lexus: I don't think it's too hard to guess why. Also note Porsche: They do very well in the Initial Quality studies, but fall to the middle in the 3-year study: Mercedes is just the opposite.


