Replying to Car Question: Where my nerds at?

Just purchased an Acura RDX last week and I have a few questions about it. I don't feel like consulting the dealer because they're questions that were sort of addressed and I just don't remember his answer. Anyway, my car has a turbo and I'm completely unfamiliar with that. Is there any basic maintenance I should be doing? I think he said something about cleaning leaves out of some part so air is able to still pass through? Erm wat? Also, inside of my gas tank it reads Premium gas only (93) but I'm almost 100% sure the dealer said I could use Super or mid grade fuel (89). Will I fuck my car up if I do? Is there a way around it? As you can probably tell I don't know shit about cars so any help would be appreciated. Thnkz guize.