I just bought my first Jeep. 2017 Jeep Wrangler unlimited big bear edition. I got it for 36,100. How did I do? I love the rims and the nav screen. I took the top off this weekend and it was a breeze. Anything I can do to improve gas mileage? I get 19 on the highway not 21 and 15 in tow. Anything else I should know?!