I have a 2018 RTL (10th Anniversary edition). Went out for a 50 mile jaunt yesterday through countryside and on highway. Clicked over to mpg screen to see how it was doing. Through the countryside I was getting around 36 mpg, which I expected. But, when I went out on the interstate running at 70-75 mph, the mpg went down to 25 mpg and stayed there pretty consistently. Granted, I was running into a headwind for most of the way. Ran about 15 miles at that speed, but did notice the fuel gage starting to drop. Just wondering if anyone else sees this type of reading on their RT? I know the only real way to check mileage is from tank-to-tank after refueling, but I thought this was an interesting observation. Thoughts?