No, neither of those? My per-km costs have been about 30% maintenance, which is pretty reasonable for a $10k econobox between 60k-120k km. I DIY the easy stuff like oil changes or tire rotations, but that bill includes several major maintenance items where I paid dealership labour rates. (shock/strut replacement, broken filler flapper, brake job, water pump replacement)

To be clear, the $155/m is for marginal costs, total marginal+fixed is $155+$75= $230/m.