Unique, go to school man, it'll pay off in the long run. Just be careful that you know what you're getting to...a lot of automotive stuff may be a lot more math, etc. than you'd want to get your hands into. Depends on what field you want to get into...be it mechanical or aerospace engineering (I'm an electrical engineering major), or automotive repair. The engineering, of course will see a million times more math than the repair part, but even servicing vehicles takes A LOT of knowledge. Some things they won't teach you in school, but others you will pick up along the way from helpful people or on your own.
At the risk of sounding like an old coot (and 21 year old coot), I would urge you to go to school and give it your all. It'll be damned hard work, but in the end, not only will your reap the benefits of a professional degree, the experience of going to college is something to be felt.