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There's no doubt that there are a lot of advances in powertrain technology that will improve the efficiency of vehicles over the next few years. There are near-term features like direct fuel injection, turbocharging and dual clutch transmissions. Other features like start stop systems and electrification of accessory drives will help too. The problem is these features all add cost to the vehicle. If consumers don't buy vehicles equipped with this kind of technology, there is no net benefit. Erni

We knew already that the 2009 Dodge Journey would be receiving a dual-clutch transmission for overseas markets, but Chrysler has just announced that the '09 Dodge Avenger and 2009 Chrysler Sebring will also offer the tranny. Mated to a 2.0 liter diesel engine, both fuel economy and CO2 emissions will improve by about six-percent. Chrysler's dual-clutch transmission is jointly produced by Getrag. One clutch engages the even ratios while the other operates on the odd. Efficiency is increased due t

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