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GM to double models with 40 mpg highway or better by 2017; ongoing manufacturing efficiency improvements

Green Car Congress

GM’s fuel-economy plan through the 2016 model year focuses on a reduction in vehicle mass and aggressive investment in advanced materials, such as high-strength steel, carbon fiber and aluminum, enabled in part by our industry-first aluminum welding technology. Earlier post.). —2012 Sustainability Report. to reflect this change.

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Tenneco developing new gasoline particulate filter (GPF) technology ahead of Euro 6c emissions regulation

Green Car Congress

GDI engines help improve fuel economy and therefore reduce CO 2 emissions; however, they can have higher particulate emissions due to shorter fuel/air mixing times in the cylinder compared to multiport fuel injection engines.

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