Objective:The objective of this work order is to advise PennDOT during their District 8 pilot fleet transition to biodiesel. The University will provide information and recommendations on best practices for current biodiesel (B5) implementation, and for other possibilities for biodiesel implementation including additional biodiesel formulations (eg., B20, B100 and the relationship between manufacturers’ recommendations and warranties). The University will also provide recommendations with respect to measures to be taken to meet 2010 federal emissions requirements. The analysis will include information on economic impacts and environmental impacts, along with evaluating performance, for the pilot study and statewide implications. Collaboration with other state agencies (i.e. DEP) is anticipated.