I'm giving up on my 14 premium. We have replaced the fuel sensor and I'm still only getting 250mi range on a full tank. Where I live is all street driving so even at the low end of 17mpg times the size of the tank that 374mi. Where had the missing 134mi gone. I've brought it to the dealership 3 times now... I've changed out everything i could for maintenance. Minus a tune up. It's at 81k though. It's even got 4 brand new tires. I'm at a loss here and it's ripping through my wallet. When i first got the car it was at at least 345mi range. I dunno wtf happened to it in the almost 3 months I've owned it. If anything it should have gotten even better milage bc of everything I've replaced maintenance wise. In think I'm about to cut my losses and trade it in. I can't figure out what could be wrong.