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This paper presents the evaluation results from the analysis of different blends of fuels using the 13-mode standard SAE testing method. Six high oleic safflower oil blends, six ester blends, six high oleic sunflower oil blends, and six sunflower oil blends were used in this portion of the investigation. Additionally, the results from the repeated 13-mode tests for all the 25/75% mixtures with a complete diesel fuel test before and after each alternative fuel are presented.

The “Truck in the Park” project was a jointly funded research project which demonstrated the benefits of the use of biodiesel in a tourism related industry. The National Park Service (NPS) operated a truck in Yellowstone National Park (YNP) for 149,408 km (92,838 miles) on 100% biodiesel fuel produced by the University of Idaho. Participants in this project included Montana Department of Environmental Quality, Wyoming Department of Commerce, NPS, Department of Energy's Regional Biomass Energy Program, Koch Agri-Services, Dodge Truck, Cummins Engine Company, J.R. Simplot, Western States Caterpillar, University of California at Davis, and the University of Idaho. This summary report details the fuel production, engine performance, durability, and engine emissions tests performed on the test vehicle. The test vehicle was a 1995 Dodge 2500 four-wheel-drive pickup with a Cummins B 5.9 liter turbocharged, direct injected, diesel engine.