I don't know Sac's demographics for people who work on cars but I've never associated being a car nerd (someone who works on their car(s)) as a more hispanic/black thing. In fact my stereotype is the "white trash" (used as a shortcut for the description, not a judgement) cars parked on the lawn. My brother-in-law, in LA, white, has had 10 cars on their property, all beaters, he works on all of them.
Are you sure home car maintenance isn't more associated with poverty than race?
Are you sure home car maintenance isn't more associated with poverty than race?