Am I wrong for feeling this way?

Maybe they would have have done that, but you're the independent son they can count on, if you change and become as 'spoiled' as your sister, it would be 2x a burden to them. She will grow up and learn that her parents can't pay everything for her some day. I totally understand you though, my parents bought a car for my sister are paying the insurance and everything for her. You don't see me asking for a car though. I would be lying if I said I don't mind, but in the end I don't think I want to burden them more.

In my country parents are bound by the law to pay for their children until they're done with school. So if you've been paying all your bills and living expenses yourself as you said, you can very well try to discuss this with your father. I'd still try to cut the rent in half only maybe, at least for the beginning? So there won't be a big 500$ hole in the household budget all of a sudden.

Well not something I discussed during the topic but the point of the saving is getting the oppurtunity to invest/move out. This whole rent thing is hindering my progress. Sure my sisters 17 but in a year nothing will change. That much is obvious. I'm not a leech though, if he were to cut my rent, I would pick up maid service to make it up. Morally I feel guilty if I'm not contributing something. So don't get the wrong idea, it's not that I want equal treatment, but equal oppurtunity.