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ORNL study quantifies fuel economy costs of common driver practices and vehicle alterations

Green Car Congress

They presented their results in a paper at SAE 2014 World Congress in Detroit. In addition, two minivans were subjected to coastdowns to examine the similarity in derived coefficients for two duplicate vehicles of the same model. The SUV, a 2009 Ford Explorer with a 4-liter V6 engine, was also tested while towing an enclosed trailer.

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ORNL researchers quantify the effect of increasing highway speed on fuel economy

Green Car Congress

One tip is that drivers should obey the speed limit since the fuel economy of most vehicles decreases above 50 mph [80 km/h]. ORNL staff members John Thomas, Shean Huff and Brian West have worked to quantify this trend through analysis of dynamometer testing results for 74 vehicles at steady-state speeds from 50 to 80 mph [80 to 129 km/h].

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2021 Jeep Wrangler 4xe: The legendary SUV brand’s first plug-in hybrid

Charged EVs

In Europe, it was smaller Jeeps—the subcompact Renegade and compact Compass family SUV—that got their plugs first. That’s not surprising—the Chrysler Pacifica Hybrid, the company’s only previous plug-in hybrid, is a well-executed PHEV with an EPA-rated 32 miles of usable electric range that retains all the virtues of the Pacifica minivan.

Jeep 110