Yeah, I'd agree with everyone overall regarding 82% being quite a solid score, especially this far out. I do disagree pretty strongly with those who say you should do the AAMC practice passages as "soon as possible." The whole point of doing practice is actually practicing things you're bad at. The #1 thing most people are bad at initially is their CARS timing. It'd be a shame to waste a ton of really high-quality passages early on when you're improving something you could do with prep company passages. If you burn through all of your AAMC passages too early, then what are you going to practice as the test gets closer? The AAMC has not yet released enough passages for three months of consistent practice.
Just my two cents though. Best of luck on your MCAT! Keep up the great work