I determined that each mile I drive costs me $.0867 in depreciation. I ended October with 41,669 and at the end of November there were 44,544 miles on the odometer. I drove 2,875 miles. For November, my vehicle depreciation expense was $249.26.
This is the least amount of miles I've driven in a month this year, and my mystery shopping income was still a respectable amount. I attribute that to not taking any significant trips to shop as most of my work was local in November.