fuel
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more fuel-efficient
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most fuel-efficient
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designed to use less fuel to do the same work
- The new car model is highly fuel-efficient, saving money on gas.
- They opted for a fuel-efficient furnace to reduce heating costs.
- Fuel-efficient appliances are becoming more popular in households.
- The airline invested in fuel-efficient aircraft to cut down on fuel expenses.
- Choosing a fuel-efficient vehicle can significantly lower your carbon footprint.