Just did a trip to Cape Cod and back (560 miles one way). Filled up in Mystic, CT to the end of Cape Cod (Provincetown) and driving all around the cape for 5 days and headed back. Filled up at the bottom of the cape and was 44.5mpg leaving the cape (Said 607 miles to empty) , didn't quite get that on that tank.
it's nice and flat on the Cape and small rolling hills it does well on EV. most of the time it was 40-50MPG for the short trips here and there around the Cape. very happy.
However, only got 38.6 mpg just before getting home and filling up, more hills had about 400# extra weight in the car.
46 PSI in tires
Grille covers bottom and middle on the whole time. (231 Water temp was highest, but i believe louvers open and it drops to 221 approx, highest tranny temp was 173.)