Which driving practice best reduces fuel consumption during a journey?

Which driving practice best reduces fuel consumption during a journey?

• A. Braking performance
• B. Extended idling
• C. Maintaining high speed
• D. Smooth acceleration and anticipation of hazards

Answer: (D)

The main idea here is that fuel use is highest when the engine works hard to repeatedly speed up and slow down. Smooth acceleration keeps the engine in an efficient range and minimizes the number of times you have to push hard on the throttle, while anticipating hazards lets you slow gradually rather than braking hard. This combination reduces acceleration cycles and unnecessary idling, so you maintain a more consistent, efficient speed throughout the journey. Extended idling wastes fuel, maintaining a very high speed increases drag and fuel burn, and while good braking is important for safety, it doesn’t inherently cut fuel consumption—often braking hard wastes energy that's been previously used to accelerate. So, smooth acceleration and anticipation of hazards best lowers fuel use.

The main idea here is that fuel use is highest when the engine works hard to repeatedly speed up and slow down. Smooth acceleration keeps the engine in an efficient range and minimizes the number of times you have to push hard on the throttle, while anticipating hazards lets you slow gradually rather than braking hard. This combination reduces acceleration cycles and unnecessary idling, so you maintain a more consistent, efficient speed throughout the journey. Extended idling wastes fuel, maintaining a very high speed increases drag and fuel burn, and while good braking is important for safety, it doesn’t inherently cut fuel consumption—often braking hard wastes energy that's been previously used to accelerate. So, smooth acceleration and anticipation of hazards best lowers fuel use.