What is the best gas mileage speed for a v8 engine on the highway?

The best gas mileage speed for a V8 engine on the highway typically ranges between 55 to 65 miles per hour. At this speed, the engine operates efficiently without excessive throttle input, reducing fuel consumption. Higher speeds often lead to increased aerodynamic drag, which can significantly decrease fuel efficiency. It's essential to consider that optimal speeds can vary based on vehicle make, model, and specific engine characteristics.