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22Chevy Tahoe increases MPGs by dropping the drag

It's not all that often that SUvs pop up on this site and even less often that one weighing in at nearly three tons graces our pages. Truth is, we rarely have reason to write about these gargantuans. Why? The answer is simple, they aren't usually what we would call green (yes, yes, we know the whole gallons per mile thing). Every once in awhile we feel bad for overlooking some of the green advancements that many SUVs have made in recent years and self-pity drives us to write up something about t

36Enterprising DIYer adds boat tail to Pontiac Firefly to boost mileage

The Aerocivic apparently has a distant relative from Canada. Darin Cosgrove, founder of Ecomodder.com, has added a boat tail to the back of his 1998 Pontiac Firefly (which is what the Geo Metro was called up north). According to Wired, the modified bodywork was constructed from cardboard, aluminum and duct tape, and it joins a series of previous aero mods including rear wheel skirts and a bellypan.

6Mercedes-Benz plans to drop drag below .20 Cd within 5 years

2010 Mercedes-Benz E-Class Coupe - Click above for a hi-res gallery

12What is cD and why does it matter?

Aerodynamics. When discussing overall efficiency, sometimes it's easy to overlook just how important the shape of an automobile is in determining how fuel efficient it is. Aerodynamics is the reason that the new Honda Insight looks so similar to the Toyota Prius and it's also the reason that the production version of the Chevy Volt looks so different from the concept that we grew to love after its introduction back at the 2007 Detroit Auto Show. So, what's the big deal?

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