Originally Posted by Frostback
Then I made up the 120 rule.
120 - my average speed = miles per gallon for my bike.
example: 120 - 65 = 55 mpg. And 220 mile range
120 - 75= 45 mpg . And 180 mile range
The slower speed lets me skip an exit and gas up, hence my total transit time to Calgary is shorter by going slower (queue the little light bulbs in my brain).
Have you proven this out at 10mph? Or better yet, at 110mph?