Not sure if you can make that leap of faith....
For example, some folks don't want to buy expensive cars or that they no longer want that...do these folks have lower education simply because they drive a Corolla?
Come on Thai....I know what you're saying, but do you really think I'm trying to say that only highly educated people drive expensive vehicles? I read somewhere that the most educated people actually are MORE likely to drive lower cost hybrids (the vehicles themselves might not always be lower cost, but their operating costs and overall costs are usually lower than average).
At the same time, you can't deny that the more expensive vehicles usually require higher salaries and higher salaries usually go with higher levels of education. Again, I'm talking demographics here, not absolutes. I know plenty of people who make very high salaries and still drive small economy cars....but most of them view cars as appliances to get them from point A to point B. They are anything but enthusiasts. I also know other people who make really good money and drive expensive vehicles just as a status thing. So it takes all kinds to make the world go 'round.