Like HowStuffWorks on Facebook!

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.

Featured
How Aerodynamics Work

Most people never think about driving through a wall; however, drivers do it each and every day -- except the "wall" is actually a wall of air and your car's aerodynamics help you break through it.


Do fuel additives really do anything?

The claims from the fuel additive bottles seem to scream at you from the shelf of your local auto parts store: add me to your tank and I'll make everything better! But do they really do that? Well, it depends on your car and on your needs. See more »

Is gasoline more dense in the morning?

Everybody says it so it must be true, right? "Buy your gas in the morning when it's cooler, and it will last longer." Well, the science behind this theory is sound, but in reality, it won't save you much. See more »

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

Car enthusiasts swear that driving a car with a manual transmission is more fun than an automatic. Manuals have also historically boasted better fuel economy, but is that still true today? See more »

Which has better fuel economy: manual or automatic?

Once upon a time, you bought a car with a manual transmission if you wanted to save at the dealership as well as at the pump. But times (and transmissions) have changed — manuals might not be the best at fuel economy anymore. See more »

How Smart Morphable Surfaces Work

When is a car like a golf ball? Simple: when it has dimples! Now why, you might ask, would anyone want a dimpled car? As researchers on smart morphable surfaces are discovering, a dimpled surface can actually help an object travel faster and farther. See more »

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

Fifteen years may seem like a long time, but if automakers are serious about meeting the new Corporate Average Fuel Economy (CAFE) standards, there's not much time to plan a strategy. See more »

Does a diesel engine equal fuel cost savings?

A diesel-powered car may cost a little more initially, but you'll make up the difference in fuel savings, right? Find out if your diesel-powered savings plans actually add up. See more »

Will all vehicles eventually be all electric?

In the early 1900s, vehicular propulsion was a free-for-all, with gasoline-, electric- and steam-powered cars all vying for popularity. Are we returning to the good ol' days of the automobile? See more »

Will nitrogen-inflated tires save fuel?

If air is already 78 percent nitrogen, is there really any benefit to paying extra for nitrogen tire inflation? And how can nitrogen-inflated tires save fuel, anyway? See more »

Safe Hypermiling Techniques

Some drivers are drawn to hypermiling because of environmental concerns, while others simply seem to share a passion for fiscal thriftiness. But are there really any safe hypermiling techniques? See more »