When did you "know" you were a car guy?

Rainy Day Auto said
It's great to see the assumption that all "car guys" are in fact guys

generic "guy"!

My daughter is a car "guy" - "gal" whatever! she is so proud when she fixes something herself and gets so mad when, due to circumstance (lives in an appt. no garage,) can't do it and has to take it to a shop or Dad!