<prompt> Human: I drive a 2005 dodge Stratus that is in average condition. Its nothing fancy. I drive an average of forty miles a week for my job. If we simply look at gas prices for my area, I would say this is pretty nice compensation. Gas is roughly 3 a gallon, so after 6 miles, Im making a profit. However, we have to factor in the car upkeep and wear and tear. This is where Im not sure how to calculate it. Any ideas ? This is purely for curiosity. Also, I started thinking about what if I had a nicer car. My sister just bought a much newer car, a 2016. Lets say I had a car like that. My wear and tear value and upkeep value would be much higher wouldnt it ? Im sure some of my colleagues have much nicer cars than I do, giving a flat rate for mileage doesnt really seem fair.  <response>: Its what the IRS determined to be fair based on studies. Realistically, if you drive a car thats already depreciated most of its value and doesnt require many major repairs, youre effectively making more money to drive 