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But the tweaks don't stop with aero finessing. The 2009 Dodge Ram spent 200 hours in the wind tunnel, and it also received tweaks to its ECU, which means it spends more time in its cylinder cutoff mode. That, plus eighty pounds of weight savings, adds up to one more MPG on the EPA sheet. Said Ford's Derek Kuzak, "We need to treat every joule of energy in a vehicle like a precious commodity."
In fact, that song hook could also be "I want my XFE." The Cobalt XFE, developed over 18 months to offer the best gas mileage in the Cobalt line, is selling six percent better than expected. Fuel economy, instead of design, is the number one reason people buy a Cobalt now. And the XFE has the lowest on-the-lot time of any Cobalt model. That's how important the price of gas has become.

These days it seems more common to overhear comments about a particular car's appalling fuel economy than idle chatter about the weather, which makes sense when a gallon of gas costs as much as a cheap umbrella. For instance, just the other day there was some guy going on about how his car was getting 3 mpg less than just a few months ago and had no idea why. That is until it was pointed out to him that his car's adjustable luggage rack was in its full, upright position, giving his car the aerodynamic efficiency of a cinder block.
That's just one of the points Forbes includes on its list of things to do so you can drive green without buying a new car. Improving your gas-guzzling vehicle's sleekness by losing that luggage rack, ditching that inefficient and egregiously ugly three-foot-tall spoiler and quit sticking your hand out the window are all little things that add up to an appreciable difference at the pump.
Most of the advice is common sense we've all heard before, but Sebastian Blanco, editor of AutoblogGreen, offered a novel suggestion for the list. Reduce your car's weight by only filling up half the tank. One gallon of gasoline can weigh as much as 6.5 lbs. On a 2008 Ford Escape, a half a tank of gas weighs 53 pounds.
Like the Forbes article points out, there's only so much you can do to curb a car's drinking habit, especially if you're driving something like an Escalade. But in smaller, lighter cars, even small steps like this can make a big difference in your fuel bill.


