NREL study finds 2nd-generation diesel hybrid delivery vans show significant gains in fuel economy over conventional vans
Green Car Congress
SEPTEMBER 29, 2012
mpg, 13% greater than the 9.2 mpg of the conventional group on those routes a year earlier. mpg, 20% greater than the 7.9 mpg of the conventional group on those routes a year later. The first study, performed in 2008, focused on first-generation hybrid vans operated by UPS in Phoenix. Earlier post.)
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