I should clarify, day 2 I kept it set at 75 unless I really had to pass.Picked up my RHO Monday night. Left from NoVA to FL Friday with 120 miles on the Odometer.
First 400 miles Friday, horrible rain, lots of stop-n-go, when the rain finally lightened up a bit I picked up to 80 to get to the hotel after 11pm and mileage was in the mid 14s for the just over 400 mile drive.
Day 2, Saturday, Florence SC to Canaveral Fl. 470-ish miles, averaged 16.3. Was a bit higher but had some traffic that dropped me a tad. Flat land and constant speed and leveraging the assisted self-drive helped a lot.
8th gear kicks in at 65, at least so far, maybe that’ll change now that I’m getting the odo up to 1k miles. The sweet spot for mileage seems to be in the 65-75 range, anything above that is a death knell to the mileage. Buc-ees in Florence with 3.27 premium (93) on Saturday morning sure was nice for a fill up.