On-road evaluation results

By | January 01, 2006
Data collection began in late July 2004. The following are results for the
12 months of on-road data analyzed:

-The five B20 buses accumulated approximately 255,000 miles on B20 with the same use as the four diesel comparison buses, or approximately 4,500 miles per bus per month. The B20 buses consumed approximately 5,000 gallons per month.

-There was no significant difference between the average fuel economies of the two groups-4.47 miles per gallon (mpg) for the diesel buses and 4.46 mpg for those using B20.

-Average miles between service calls were 3,211 miles for the buses using diesel and 3,982 miles for those using B20.

-Total maintenance costs for the two groups were 56 cents per mile for the diesel-powered buses and 52 cents per mile for the buses using B20. Engine and fuel system maintenance costs were 5 cents per mile for the diesel-powered buses and 5 cents per mile for the buses using B20. These differences in maintenance cost are not believed to be significant. Labor cost is assumed to be $50 per hour for all maintenance cost calculations.
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