On average, how much more fuel is used driving at 70 mph than at 50 mph?

Explanation: Using the same gear travelling at 70 mph uses approximately 30% more fuel than using the same gear travelling at 50 mph. So you'll save fuel travelling at lower speeds, but shouldn't inconvenience or engager other road users by travelling too slowly. You'll also use less fuel by braking and accelerating gently, and using appropriate gears for the speed you're travelling.

Category: Safety and your vehicle