Fuel Economy

We've all done it — forgotten to put the gas cap back on after fueling up and then driven off from the gas station. So is it bad for our cars?

By Cherise Threewitt

We've all done it – looked down and suddenly realized we're almost out of gas. What kind of wear-and-tear does this put on your car?

By Cherise Threewitt

Scientists created an algorithm that matched people for social, as well as geographic compatibility, increasing rates of carpooling.

By Alia Hoyt

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.

By Cherise Threewitt

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.

By Cherise Threewitt

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?

By Jamie Page Deaton

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.

By Jamie Page Deaton

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.

By Jamie Page Deaton

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.

By Cherise Threewitt

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.

By Kristen Hall-Geisler

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?

By Kristen Hall-Geisler

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?

By Kristen Hall-Geisler

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?

By Cherise Threewitt

In general, hypermiling is a dangerous practice. In fact, some of the most effective hypermiling strategies work only because the driver intentionally sacrifices control of the vehicle.

By Cherise Threewitt

Some of these eco-mods appear to be logical, while others seem a bit like wishful thinking. Can the right eco-mod for your car save you money at the pump?

By Cherise Threewitt

As they say, "Your mileage may vary." But if you're new-car shopping, you probably want a reliable fuel economy number. Where do you go? Who can you trust?

By Kristen Hall-Geisler

There are two ways to measure your car's fuel economy: miles per gallon (mpg) and gallons per 100 miles (g/100m). Do you know how to calculate both of these figures?

By Kristen Hall-Geisler

You're not here looking for ways to not drive your car. Nope, you want advice that will keep you trucking on the cheap, so let's get to it. Here's a freebie: Tying four mattresses onto the top of your car is not super fuel efficient.

By Nicholas Gerbis

While fuel prices may be dropping at a faster rate than the stock market, drivers are still spending huge portions of their budgets on filling the tank.

By David Goodspeed

Fuel economy labels have been around for about three decades. But now it's time for new labels, and the EPA calls it "the most dramatic overhaul in the history of EPA's labeling program."

By Christopher Lampton

Gas vs. Grid: Gasoline and Electricity Face Off! Check out this awesome infographic projecting energy consumption in 2012 and discover which cars are the most fuel efficient.

Avoid topping your gas off. Learn in this article why you should avoid topping your gas off.

By Jasmin Malik Chua, Planet Green

Go on any highway and you'll see many vehicles with roof racks. Learn more about your roof rack affecting your gas mileage.

By Michael Graham Richard, Planet Green

During the summertime, it could be said that the hottest moment between is when you first get into your vehicle. Learn more about cooling your vehicle quicking during an intense summer heat and reduce carbon emissions.

By Eric J. Leech, Planet Green

How to tune your own car for better gas mileage. In this article, learn how to tune your care for better gas mileage.

By Eric J. Leech, Planet Green