What does fuel efficiency mean?

Fuel efficiency refers to the amount of energy delivered by an engine or machine, compared to the amount of fuel consumed. Typically, fuel efficiency is measured in miles per gallon (mpg) for vehicles, or kilowatt-hours per mile (kWh/mile) for electric vehicles.

Fuel efficiency is an important consideration when purchasing a vehicle, as it can significantly impact the cost of ownership. More fuel-efficient vehicles will consume less fuel and therefore save money on fuel costs over time. Additionally, fuel efficiency is also important for reducing emissions and improving environmental sustainability.

There are many factors that can affect fuel efficiency, including the type of vehicle, engine size, driving conditions, and maintenance. Some of the most fuel-efficient vehicles are hybrid and electric vehicles, which can achieve significantly higher mpg ratings than conventional gasoline-powered vehicles.