New car mileage

Had recent rental car experience with two new cars that got great gas milage:
2022 Audi A4, drove from Indy to the UP of Michigan and back for the labor day Mackinaw Bridge walk. The Audi A4 was a fun ride, all the engine power that could ever be needed, quiet. great driving car. Got 42+ MPG cruising the highway at 70-75-80 mph.
2022 Toyota Camary, drove from Indy to Nashville TN and back a few weekends ago, meeting up with friends for a weekend out. Nice driving car, comfortable driver. Not as sporty as the A4, but the Camry also got highway mileage in the 40's and has an adult friendly back seat.
I bet that either of those cars would get 45+ highway mpg at a steady 65 mph highway.