Fuel mileage still sucks

[Lead_sled]

I’m thinking that it may have been a stuck EGR valve. Nothing has changed whatsoever except the outside temp being 30 degrees cooler and wet roads. My instant economy meter is reading 6.1 mpg, which is what it used to read a couple months back. I haven’t hand calculated yet because I haven’t filled up yet. But at a half tank on the fuel gauge, I’d be between 280-310 miles. I’m currently at 250 miles and right between 3/4 and 5/8 tank. I don’t think a leaky injector would’ve corrected itself or leak in boost system either. Valves wouldn’t have given themselves an adjustment either. Just more reason to de-mandate ASAP.