Well I just typed a long reply, and the server decided to freakin' lag on me so I have to retype it.
So as I was saying, gender really shouldn't affect people's ability to know more or be "fond" of cars. I mean in general (stereotypically), males do know more about cars than females, but that's not always the case. Like you will one day come across some girl that knows a lot more than you, so this can't be a set rule or anything. But that's only my opinion, males know more.