So I get the new 300 and drove straight to Discount tire and put on some Black Hellcat 20”s in 245/45/20 Falken from the tiny scratched up 17’s. Looks freakin awesome. Driving around for a day or two all happy and feeling like Vin Deisel and boom, I noticed it while I was messing with my settings. GPM 10.8 average. I drove around trying to get it up and then noticed I can literally see the little blue fuel bar shrinking every block. I’m not sure how much weight I added but I’m guessing way too much. With the 17’s the blue never moved for a few days. What should I do? If I managed to go to 18’s would it be the same? I had a Cool Vanilla C back in the day that even with a canned tune got me 14mpg. I’m kinda trippin a bit. Disappointed in myself that I would make this mistake without doin my homework.