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57AutoblogGreen Q&A with Transonic Combustion: Can supercritical fluids give a 30% mpg boost?

Given that the traditional four-stroke Otto-cycle engine piston engine only has a thermal efficiency of 25-30 percent, there is clearly still plenty of room for improvement. While most of the green automobile attention in recent years has been focused on electrification, liquid fuels still have about 100 times the energy density of today's best lithium-ion batteries, a difference that probably won't change significantly any time in the near future.

65Review: 2010 Audi A5 is a personal luxury coupe for the modern age

2010 Audi A5 – click above for high-res image gallery

34Deep Dive: Curve Control on the 2011 Ford Explorer [w/video]

Curve Control on the 2011 Ford Explorer – Click above for high-res image gallery

23Deep Dive: Getting intimate with the 2010 Honda CR-Z's powertrain

When the 2011 Honda CR-Z hits the streets this Fall, it will feature the latest iteration of the company's Integrated Motor Assist (IMA) mild hybrid system. The basic concept of IMA hasn't changed since the original Insight debuted in 1999, but it has been refined to improve performance and efficiency while reducing overall cost.

19Deep Dive: Getting intimate with the 2010 Honda CR-Z's powertrain

When the 2011 Honda CR-Z hits the streets this Fall, it will feature the latest iteration of the company's Integrated Motor Assist (IMA) mild hybrid system. The basic concept of IMA hasn't changed since the original Insight debuted in 1999, but it has been refined to improve performance and efficiency while reducing overall cost.

57First Drive: 2011 Chevy Silverado and GMC Sierra Heavy Duty trucks set new HD standard

2011 GM HD Trucks - Click above for high-res image gallery

13First Drive: 2011 GMC Sierra and Chevrolet Silverado Heavy Duty technical deep dive

2011 GM HD Truck New Technology – Click above for high-res image gallery

85Review: 2010 Acura ZDX is a space (challenged) oddity

2010 Acura ZDX – Click above for high-res image gallery

42Review: 2010 Mercedes-Benz S400 Hybrid, who is it for?

2010 Mercedes-Benz S400 Hybrid – Click above for high-res image gallery

12Introduction to Ice Racing: Part 5 [w/video]

A TRACK DAY WITH SNOWBANKS

41Greenlings: How do hybrids and electric vehicles blend regenerative and friction braking?

How do hybrids and electric vehicles blend regenerative and friction braking?

70Review: 2010 Acura TL SH-AWD 6MT is a mouthful, not a handful

2010 Acura TL SH-AWD 6MT - Click above for high-res image gallery

12Introduction to Ice Racing: Part 2

THE WHAT AND THE HOW

17Video: We take Kia and Microsoft's Uvo for a test drive at CES

Kia's UVO system hands-on – Click above to watch video after the jump

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