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This Peterbilt shown in a US Dept of Energy video on heavy duty truck fuel efficiency can achieve 107 mpg thanks to technology and aerodynamic enhancements Subject to appropriations the department is investing 80 million in grant funds in its SuperTruck II project and another 57 million for 35 projects across the country to reduce petroleum consumption and carbon emissions for vehicles ranging from passenger cars to heavy trucks
In early results the seven trucks participating in the Run on Less roadshow have averaged 101 mpg with a highest daily fuel efficiency for a single truck of 128 mpg and lowest of 74 mpg Photo Run on Less
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