By "were honest" I mostly mean "honest with themselves". There are a lot of costs that are easy to forget or ignore. The cost of parking in the city. The occasi

By "were honest" I mostly mean "honest with themselves". There are a lot of costs that are easy to forget or ignore. The cost of parking in the city. The occasional repair. Having to tow your car, because it broke. Deprecation of a valuable asset. Very few people take stock of what they actually spend on their car, because it's hard and it's constantly shifting. Some costs are annually and (mostly) independent of your annual mileage - insurance and tax, for example. Others are constant and directly associated with your mileage - fuel. Yet, others again are directly associated but come in lumps - maintenance, tires, ... Deprecation is fuzzy and partially outside of any factor you can control, etc.