Auto Parts Store or Tire Changing Facility?

I am 17 years old currently training to be an automotive mechanic. I want to get two jobs this summer, I currently work at a place called Robeks right now, Im currently fired but they'll need me back in the summertime. I wasnt getting enough hours there anyway so it wasnt that disappointing. I only made about $14 a week with how slow we were. If I work at an auto parts store, ill learn a lot more about different parts. But if I work at a tire changing facility, ill be able to do the fun hands on work of changing tires and a little better pay, but im not gonna learn a lot more. Ill learn a little but nothing more than that. So I want your opinion on what I should do. Should I work for Tire Discounters or Advance Auto Parts?