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Old 08-02-2013, 08:12 PM   #2 (permalink)
ksa8907
Master EcoModder
 
Join Date: May 2012
Location: Tampa, FL
Posts: 1,533

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
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Higher gear count transmissions are definitely gaining popularity, in the near future chrysler will be using solely 8 and 9 speed transmissions. Aerodynamics is also a hugely important aspect, the public doesn't want to drive slower so the only way to get those high mpg numbers is small turbo engines, lots of gears and very aerodynamic bodies.
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