Well I suppose if you want to seattle for a notebook. I have alway tracked the work performed (I guess the aviator in me). I used to track in an Access DB and gas mileage in Excel that I created but found that it didn't do everything I wanted.
For $30 how can you go wrong for nice reports, graphing etc. Much nicer than a notebook. Besides $30 is money well spent. Its bad enough that I track this stuff nevermind take the time to develop a nice way to track it and present it.
Not that I'm planning on selling the MO but its a great selling feature... "here are my maintenace reports."