My friend is a car nut, she's not SUPER knowledgeable but she tries and she's more than willing to learn.
What she does do is go to the track regularly and race her cousins Civic, Z4 or E92 M3. She's an oddball though, wouldn't drive a new car very often if it was given to her... kinda likes the beaters and loves old school civic hatch's.
Sweet girl though, definitely breaks the stereotype the way I wish more girls would.
To the lonely souls complaining about not being able to find a girl that really & honestly gives half a crap about anything auto related... have you actually tried looking before ya gave up? Open mind fellas, you'll have a much much harder time trying to find a girl that looks like a JDM model AND shares your passion. Be less shallow! I'm not saying you need to be considering Shrek's Fiona but I'll personally take a plain Jane that shares any of my many passions over a beautiful air head.
They're out there gents but ya gotta hunt! Don't expect them to come to you or you'll lose to the next guy
; trust me, girls that awesome have PLENTY of options.