The International DuraStar Hybrid has the proven capability to provide dramatic fuel savings - from 30 to 40 percent on standard in-city pickup and delivery applications. That fuel efficiency can increase to more than 60 percent in utility-type applications when the engine can be shut off, but electric power still operates the vehicle. For example, diesel emissions are completely eliminated when the hybrid truck operates equipment (like overhead utility booms) solely on the truck’s battery power, instead of allowing the engine to idle.