After my first fill up last night then out on the highway, I was showing 18.4 on the current average cluster, after a few miles of cruise control driving set at 65mph.Yep. I doubt I'll drop 6th until 55mph, and that is if I'm cruising. I'm pretty sure I'll only drop 6th when I hit the desired cruising speed, whether it is 60, 65, 75, or whatever. I won't accelerate with it, only cruise, especially when I go to 35's. It feels TALL.