After 700 miles in my ionic 5 I average 4.7 have you got it in auto mode? I’ve seen it at 5.2 more often it’s possible you don’t have something set right the eco mode seems worse than normal with brake mode 3 can drive it without using the brakes unless stopping or to get it even higher put it on auto mode then it will stop itself in traffic you just have to press a button for it to go again as the traffic moves, I sit in a hour of traffic per day. I’m waiting for it to drop with the cold weather but yet to need the heating on. Hope that helps Markah2007