Seattle Fire Department gains 23% increase in miles driven per gallon with the XL3 ® Hybrid Electric Drive System Vehicles Ford E-450 ambulances are used for responding to 911 calls in the City of Seattle. Results The ambulances have achieved a 23% increase in miles driven per gallon in Seattle’s duty cycle, which includes steep urban grades and temperature changes. The hybrid ambulances, which each kept the Ford powertrain completely int

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