I only added the cost for a bit of comparative fun, fill the passenger seat for the trip and you cover the tyre wear.

On the annual mileage I do in the NSX the depreciation for this single trip is incidental and if I never sell it (which is the intention) it matters not anyway.

If we both go on the train we add taxi costs at either end then have to hire a car to get around when we get there adding a lot more to the cost.

The car rules

Mark