Fuel Efficiency

Fuel efficiency has become an extremely important topic in today's world because of rising gas prices, the need to cut our carbon footprints, and the need to cut dependence on oil-rich nations. Check out these great articles on fuel efficiency.

Hybrid cars are fuel-efficient -- there's no doubt about that. However, is it true that hybrid car manufacturers have found a way to make use of kinetic energy that's normally wasted?

In 1999, Honda Motor Company became the first automaker to sell a mass-produced, gas-electric hybrid to U.S. drivers -- the 2000 Honda Insight. But how has Honda refined the Insight for 2010?

With very few exceptions, cars have always required batteries. Hybrid and electric cars use high-powered (and often expensive) battery packs, but could you power your car with ordinary AA batteries?

The E-Flex Propulsion System is a new platform from General Motors that will power the highly anticipated Chevrolet Volt sedan. If GM has its way, most commuters won't have to burn any gas as they travel to work each day.

Replacing the battery pack on your hybrid can easily set you back $2,500 or more. However, the prices for these components are changing as quickly as the hybrid car industry itself.

The strangest thing about the invention of the first hybrid car isn't who built it (a German engineer named Porsche), but when he built it -- at the turn of the 20th century.

If you're a member of Sam's Club, then you already know the great deals a membership can provide for you and your family or business. But can you really buy an electric car through Sam's Club, too?

Did you know your car is operating at its lowest possible fuel efficiency when you're in stop-and-go traffic or if you're at a standstill and the engine continues to run at idle speed?

Honda's taking a new approach to hybrid car design with its latest concept -- the CR-Z. But what makes the CR-Z so different from every other hybrid car currently on the road?

With the Spanish Minister of Industry promising one million all-electric vehicles on Spain's streets by 2014, a new hybrid plug-in concept from Spanish automaker SEAT is a step in the right direction.

Most of us have been told that driving with the air conditioner switched on uses a lot more fuel than simply rolling the windows down to cool off. But is that always true?

There's little doubt that the 2010 Fisker Karma, a plug-in hybrid electric vehicle, has the looks to compete with any luxury sedan currently on the market. But how does the Fisker Karma perform?

Hybrid cars are engineered to operate at peak efficiency in specific environments. But what happens when the environment is dramatically changed? Can a hybrid car perform just as well in cold weather?

Hybrid cars aren't generally thought of as sports cars -- not right now, anyway. But if the Toyota FT-HS Hybrid Sports Concept ever makes it into production, you may have a very different opinion.

For conventional gasoline and diesel-powered vehicles, fuel economy numbers may be the toughest standards to meet in the coming years. But what issues will alternative fuel vehicles need to overcome?

The race is on to build the world's cheapest alternative fuel car as fossil fuel supplies continue to plummet and the planet's population continues to soar. This race has already seen several lead changes.

From the start, Porsche has produced a lineup of cars that are exciting to drive. The latest Porsche -- the Porsche Panamera -- is no exception. But do you know what makes the Porsche Panamera unique?

Replacing a battery in a typical car isn't a big deal, and relatively speaking, it isn't expensive either. Hybrid car battery packs, however, can cost thousands to replace. Is reconditioning cheaper?

If you've been doing your homework on hybrid cars, then you may have come across the term "mild hybrid" at some point in your studies. But how does a mild hybrid differ from any other hybrid car?

For some, the quiet operation of a hybrid car is a pleasant experience. For others, like pedestrians, a silent car can actually spell danger. Is the Lotus Safe and Sound system the answer?

Most hybrid cars have instant miles per gallon readout as standard equipment. This feature gives immediate mpg information to the driver. But can this simple device actually save money at the pump?

In this increasingly green world, automakers are looking for ways to increase product efficiency. Their focus might surprise you: The exhaust pipe.

Some potential hybrid car buyers never actually buy a hybrid because they feel the batteries are too costly to replace or have a somewhat short life. So, what's being done to improve the technology?

If you don't drive a hybrid car, you may not know the purpose of a hybrid system indicator. Not only do they monitor the car's vital operating systems, but they help drivers become more efficient, too.