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Auto | Fuel Efficiency | Fuel Economy

Fuel economy is about maximizing the number of miles your vehicle can travel on a gallon of fuel. The cost of fuel has a major impact on fuel economy. Check out these great fuel economy articles from HowStuffWorks.

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How much extra gasoline would Americans use if daytime running lights were mandatory?

As gas prices spike daily, we're all looking to save money at the pumps. But if your car uses daytime running lights, be prepared to dig deep into your wallet.


The Car Aerodynamics Quiz

The Car Aerodynamics Quiz

Fire up the wind tunnel and get ready to answer 30 questions about how air flow affects car performance with this quiz at HowStuffWorks. See more »

The Fuel Efficiency of Military Vehicles Quiz

The Fuel Efficiency of Military Vehicles Quiz

How much do you know about the fuel efficiency of military vehicles? Test your knowledge by taking this quiz at HowStuffWorks. See more »

The Price of Oil Quiz

The Price of Oil Quiz

How much do you know about the price of oil around the world? Test your knowledge with this quiz at HowStuffWorks. See more »

The Global Oil Production Quiz

The Global Oil Production Quiz

How much do you know about global oil production? Test your knowledge with this quiz at HowStuffWorks. See more »

True or False: The Fuel Economy Myths Quiz

True or False: The Fuel Economy Myths Quiz

Do you know fact from fiction when it comes to fuel economy? Test your knowledge of fuel economy myths with this quiz at HowStuffWorks. See more »

Out of Gas: The Alternative Fuels Quiz

Out of Gas: The Alternative Fuels Quiz

How much do you know about alternative fuels? Test your knowledge with this quiz at HowStuffWorks. See more »

The Worst Gas Guzzlers Quiz

The Worst Gas Guzzlers Quiz

Do you know which cars are the least fuel efficient? Test your knowledge of the worst gas guzzlers with this quiz at HowStuffWorks. See more »

Test Your Knowledge: Autonomous Cars

Test Your Knowledge: Autonomous Cars

How much do you know about autonomous cars? Test your knowledge by taking this quiz at HowStuffWorks. See more »

The History of Oil Crises Quiz

The History of Oil Crises Quiz

How much do you know about the history of oil crises? Test your knowledge with this quiz at HowStuffWorks. See more »

Do fuel additives really do anything?

Do fuel additives really do anything?

Do fuel additives do anything, or are the claims on the bottle just clever advertising? It might depend on your car. Learn more about fuel additives. See more »