Can I test drive cars without the intention of buying them onto other car lots just to ask the owners if I can test drive theirs
Why are you driving test cars to other lots?
I'm searching for new cars to test drive.
If you're intending to purchase a car at some point, that's OK. But you shouldn't do it just to be taking joy rides. Your wasting the dealers' time and using merchandise that a real buyer could be using.
I know a lot about cars, so I'm educating myself.
If you are educating yourself in order to make a purchase decision then it's okay to take test drives. For any other education purposes you should probably just look a video or talk to an auto mechanic. You are potentially cutting into a car dealer's sales by tying up a car with a fake test drive.