i agree w/ that last post but
the question is what in particular do you want to learn about? Of course cars... but that just seems too vague. Do you want to know about suspension, engine, aerodynamics?? It's all there.. be particular in what questions you ask to who... just look around.. are you a Nissan person? honda? big differences between all the engines, etc...
hope you find what you're lookin for.
-x-