I like the term "ownership expenses"...just ambiguous enough to work.

That way, you can even include fuel costs and wear and tear without being definitive!

Kind of levels the playing field when comparing different cars and the "cost of ownership"...

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car