Hi Neil, I printed this a few weeks ago thinking I would do the calculations. Studying it brought me eventually to the end of the pamphlet, where the author says there are more variables than he originally thought and so the formula might not work well. Do you have a way around that problem? It's also too late for me to calculate a baseline.
james
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
The main variable is the rolling coefficient of the tires -- I just used the lowest end of the range, since I know that having my tires pumped up lowers the RR. The other things like barometric pressure or elevation, I just took the default or my best guess (I used Google Earth to get an elevation).