I'm with the Excel fraternity. One page for daily travel, one for fuel and one for maintenance/rego/insurance costs.
The scarey part is when you add up what you spend, especially if your taste in farkles extends to Zumo 660s, tank bras, cruise controls, Starcoms etc etc. That's before you figure in petrol at $1.40 plus and tyres at $200+ each.
We don't do it to save money.
It's a bit like the definition of a recreational boat- a hole in the water to pour money into.