Nice Solara, as for mentioning your car hobby during your interview just be cautious. Some interviewers have preconceived notions about what you are trying to pull off as an EC. I used to work on/race streetbikes, and for some reason my interviewer thought I played with pocketbikes or something... it just didn't sit well with him.
You don't want your interviewer to be thinking in the back of his or her mind that you waste your time installing neon lights, loud exhausts or illegally street race... Not that you actually do or don't do these things (I'm personally fine with all that import stuff), but it may not come off as being very mature.
The best way to play off your car hobby is to say that you are into automotive repair and maintenance. And from there you can discuss how much you enjoy learning and working with your hands. I used to discuss how I loved working on my old car (3000gt) and how I learned to fix mechanical problems on my own..
Granted that was a mitsu and was damn prone to repairs, but you have a toyota and those things never have problems