i figured out some new ex-math to help you improve your ex-miles-per-gallon in you vehicle. the way i see it mileage is the number of miles that it takes to get you from one place to another. it takes me 17 miles to get to work. if i ride my bike one day that is 34 miles i didn’t drive my car…i can add it to my car’s total mileage. if i go out for a 100 mile weekend ride, i can not add it to my mileage. however if i ride out to a bike trail and ride the trail, i could arguably add that to my car’s total. here are some rules:
1. only add miles that you used to replace a car drive.
2. do the calculation after each fill up. don’t just drive a mile and fill it up after a really long commute and get like infinity miles per gallon.
3. do it for a long period of time, just to see how much you save.
sample calculation for this tank:
miles driven = 420
miles ridden= 102
total miles = 522
total gallons= 11
ex-miles per gallon= 522/11= 47.5 emg!!! [note this is with only 3 days of bike commuting]