[Aka]

I decided when purchasing my new car I'd keep an excel spreadsheet log of all my maintenance and running costs of my car in order to prove to myself it was a good decision. However it's not a very good spreadsheet.

How do you guys keep logs? Do you have a fancy spreadsheet with macros to do every little thing you could think of? Or just a pencil and book in your car?

I would like to have a nicely formatted spreadsheet that produced graphs to help me visualize a few things better. And I've messed with it a bit, but thought it might be good to ask for ideas or perhaps even receive examples from others.

The most important thing (to me) that mine does is produce the cost per km.

Edit: Alternatively, are there any websites to do this sorta thing, I've seen a few but they're poorly made.