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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.


Is gasoline more dense in the morning?

 Is gasoline more dense in the morning?

Is gasoline more dense in the morning? Should you fill up before the afternoon? Find out at HowStuffWorks. See more »

Are today's manual transmission cars more efficient than automatics?

 Are today's manual transmission cars more efficient than automatics?

Manual transmissions have historically boasted better fuel economy. Find out if manual transmission cars are still more efficient than today's automatics. See more »

Which has better fuel economy: manual or automatic?

 Which has better fuel economy: manual or automatic?

In the past, manual transmission cars had better fuel economy. But what about today? Find out if manual or automatic transmissions have better fuel economy. See more »

How Smart Morphable Surfaces Work

 How Smart Morphable Surfaces Work

Smart morphable surfaces, or smorphs, are surfaces that change in response to the conditions around and inside them. Learn all about smart morphable surfaces. See more »

Where will fuel consumption and economy be in 15 years -- and beyond?

 Where will fuel consumption and economy be in 15 years -- and beyond?

The new CAFE standards are scheduled to increase 5 percent every year from 2017 to 2025. Learn about fuel consumption and economy at HowStuffWorks. See more »

Does a diesel engine equal fuel cost savings?

 Does a diesel engine equal fuel cost savings?

Does driving a vehicle with a diesel engine always translate into fuel cost savings? Learn more about diesel fuel economy at HowStuffWorks. See more »

Will all vehicles eventually be all electric?

 Will all vehicles eventually be all electric?

If history is any lesson (and it is), we're probably headed back to the good old days of the automobile. Find out why at HowStuffWorks. See more »

Will nitrogen-inflated tires save fuel?

 Will nitrogen-inflated tires save fuel?

Is there any benefit to paying extra for nitrogen tire inflation? And how can nitrogen-inflated tires save fuel, anyway? Find out at HowStuffWorks. See more »

Safe Hypermiling Techniques

 Safe Hypermiling Techniques

Hypermiling can be dangerous -- but there are a few safe techniques you can practice. Learn more about safe hypermiling techniques at HowStuffWorks. See more »

Dangerous Hypermiling Techniques

 Dangerous Hypermiling Techniques

Is saving a few drops of gas worth endangering the lives of everyone else on the road? Learn about dangerous hypermiling techniques at HowStuffWorks. See more »