My bike gets about 40mpg and the car gets 23.8mpg. I have FuelLog on my phone and you input your odometer, fuel volume, and volume price and it figures a bunch of stuff out for you. For instance, on average it costs me 14 cents per mile, 7.11mi per dollar, average of $199.29 per month and and average of 17.239 per year. Pretty cool app actually.