Ok, so 15K miles/year isn’t uncommon, 3USD/gallon is close to average, 25 mpg is optimistic.
So currently the average american is paying 1,800 for 600 gallons a year. So roughly 5x, without considering cost of maintenance and depreciation.
But then you have bikes. A Honda Wave gets like 160 mpg.
2? I do 10, so it takes me at least 30 seconds to turn them all off.