Environmental Awareness and Fuel Efficiency
Smooth is efficient
Fuel economy is mostly about avoiding wasted energy. Accelerate gently, change up early, hold a steady speed, and look far ahead so you can ease off instead of braking and re-accelerating. Every hard acceleration and late braking moment costs fuel. Cruise control helps on steady highway runs but is unhelpful in traffic.
The easy wins
Correct tyre pressure cuts rolling resistance; soft tyres waste fuel and wear faster. Remove roof racks and unnecessary weight. Use air conditioning sensibly - it does raise consumption, but open windows at highway speed create drag that costs more. Avoid idling: modern engines need no long warm-up, and sitting with the engine running in traffic or while waiting simply burns fuel.
Maintenance and planning
A serviced engine, clean air filter and correct oil keep consumption down. Plan routes to avoid peak congestion and combine errands into one trip, because a cold engine is least efficient in its first few kilometres. Carpooling and public transport reduce emissions more than any driving technique.
Traps
Expect options such as "warm the engine for five minutes" (wrong), "coast downhill in neutral to save fuel" (wrong - you lose engine braking and control), and "air conditioning has no effect on fuel" (wrong). Reject any economy measure that trades away safety, such as over-inflating tyres or switching off lights.
Worked rule
Imagine a glass of water on the dashboard: if your driving would spill it, you are wasting fuel.