I use a spreadsheet to keep track and budget car running costs. I've produced a schedule for the generic shitter car that maybe of interest to someone. I've posted some screenshots below and would be happy to email the file directly to anyone who wants it. If you have any corrections of improvements to add that would be awesome.
It was produced on OpenOffice so may have formatting glitches in Excel.
This guy has a good book and his Youtube is a great source of info. I think he deserves more views and comments IMO.