You dont need to buy a top of the line bike for commuting. The last one I bought cost me 900 (Ride 1up Core5 bought on holiday sale) and is an amazing commuter bike. $900/6.50 per gallon=138.5 gallons. USA avg fuel economy is 25.5mpg (only for 2020 and newer though). So it would require approx 3500 miles to be fully…