One more idea
 

In the "add a note" section, it would be nice to have an optional field for a dollar amount spent. Then on the home screen for a vehicle, this amount could be used to compute the cost per mile. For instance, if you add "Oil change & filter", and a dollar amount of say $25, that $25 would be added to the total cost per mile of operating the car. Mabye there could be 2 cost per mile amounts, one for fuel only, and one including everything.

I like it, true cost-to-own, minus paying for the car of course.

The people that do their own maintenance should cancel out the people that are getting screwed for repairs, and will be a nice average.

I like this idea too! This may be complicating it further, but maybe add categories to track:

- fuel costs

- oil change

- minor repairs / parts replacement (starter, battery, bulbs, alternator, A/C, tires, etc.)

- major repairs (internal engine, transmission, etc.)

That may be too much to ask but it would be interesting to track true cost-to-own as alnmike points out.