Fuel-saving technology like hybrid power and turbo-charging, they say, isn't enough to do the trick.
Five-speed automatics and six-speed manuals are common, and there's the new fuel-saving, infinitely variable transmission.
It plans to position its diesels as a better fuel-saving alternative for drivers with lead feet.
Here, courtesy of Total Car Score, are 10 fuel-saving technologies that will save you money.
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Despite a fuel-saving concept the plane is designed to go at a speed of 450 mph.
The consequences are huge, not just because the cost of fuel-saving technologies can be onerous.
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Besides, many of the fuel-saving advantages of green-branded tires are now built into standard tires, he said.
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So luxury automakers are responding, not only with four-cylinder engines, but hybrids and other fuel-saving technology as well.
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Its fuel-saving possibilities, cutting edge technology, operational versatility and cabin appointments generated enormous interest from airlines, initially overseas.
But Toyota is pressing ahead anyway, confident that, with practice, it can master fuel-saving technologies more quickly than rivals.
Vehicles with fuel-saving six-speed transmissions or cylinder deactivation systems let a big V8 engine run on just four cylinders on the highway.
Though Mazda is not offering a hybrid version of the new 6 sedan, it is including some fuel-saving technology that is unlike anything currently available.
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The need for the fuel-saving orbit was the result of a technical problem early on in the mission (it was originally intended to arrive in 1999).
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Our friends over at Total Car Score, a research site for auto buyers, came up with a bevy of 2013 models that already feature great fuel-saving technologies.
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Boeing has continued to upgrade its 747 in response to the Airbus challenge and with a slight twist brought out its smaller 787 Dreamliner aircraft with an increased fuel-saving design.
As well as travelling slower, new ships like the Eugen Maersk have other fuel-saving and potentially environmentally-friendly features, such as a redesigned bow and special paint to reduce friction through the water.
"The good news for customers is that they not only have more choice, but they have faster access to Ford's latest and greatest in fuel-saving technologies and vehicles, " said Joe Bakaj, Ford vice president of Powertrain Engineering.
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The light trucks coming to market like the next-generation Chevrolet Silverado pickup and Ford Transit cargo van feature loads of fuel-saving technologies, proving you can have the space and capability you need and still get decent gas mileage.
This was actually launched in 1998, but it followed a complicated fuel-saving orbit that sent it around the sun and back to Earth, to be slung towards Mars at the same time as the other missions took off.
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Boeing (nyse: BA - news - people ) has continued to upgrade its 747 in response to the Airbus challenge and with a slight twist brought out its smaller 787 Dreamliner aircraft with an increased fuel-saving design.
Flight AC991 from Toronto to Mexico City is expected to generate at least 40 per cent fewer emissions by using jet fuel derived from recycled cooking oil and through other fuel-saving measures, making it the most environmentally-friendly flight ever flown by Air Canada.
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Meanwhile, the feds' fuel-economy administrators are currently operating at a dead run trying to keep up with a host of new, highly digitized fuel-saving technologies, such as "Eco" throttle mapping and stop-start (the engine cuts out as the vehicle coasts or stops), which were practically invented to hack the EPA testing cycle.
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Eligible improvements (PDF) include not only energy-saving equipment such as insulation, lighting, and HVAC systems but onsite renewable energy (rooftop PV, wind turbines, and fuel cells) and water-saving upgrades such as low-flow plumbing fixtures and grey water systems.
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Cooks merged last year with MyTravel, and cut 2, 800 jobs as part of huge cost-saving plans to offset high fuel costs and steep competition.
And the wings are the reason this plane is considered one of the most revolutionary in aviation history (the weight-saving reduces per-passenger fuel consumption by 20 percent).
The government has ambitious policies for expanding renewable energy, and it also wants to ensure that vulnerable people, pitched into fuel poverty, are protected or provided with energy-saving measures.
And, yes, choosing a more fuel-efficient car can indeed be a significant cost-saving measure.
It was Carlyle that worked with the White House to buy a Philadelphia oil refinery in September, saving 850 union jobs and averting a fuel-price increase in the Northeast.
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