It costs an average of $0.72 a mile to operate my Jeep. That includes everything involved with owning it and is based on driving an average of 10,000 miles a year. I calculated how much it has cost me to own and operate my bicycle since 2001 when I purchased it. It is an average of $431.25 or $0.28 a mile based on riding an average of 1,500 a year. That is $0.44 a mile less than operating my Jeep. I was using the $0.72 a mile average to calculate how much money I earned/saved for riding bike vs. drive my Jeep for commutting to/from work or running errands. Going foward I am going to use the average of $0.44 a mile for the amount earned/saved for riding my bike and not using my Jeep. Because I was using the wrong figures to determine amount earned/saved by riding bike vs. driving my Jeep and not the average figure I should have been using, because the amount of money I am putting into my bike this year to get it in operational order and because the 2 amounts zero each other out I am starting with a blank figure this year and using the $0.44 a mile average.