I find this to be particularly true. Ours is a 2019 with the new Ford 8-cyl Godzilla. If I push the speed to 65mph, I find gas mileage will dip dramatically - 6.5 - 7mpg. But if I hover from 55 - 60 mph I can eek out 9-10 mpg.
Jeff & Sharon Wise
2021 Forester 2151LE-<2020 Jeep Wrangler Sahara
Dripping Springs, TX