You think owners have a less costly situation than renters? That is
truly funny! :-)

On a trip by trip basis we do.

The fixed costs are already sunk, so we get to fly for the cost of
fuel, oil. In my Cherokee that's about $40/hr, substantially less
than the ~$100/hr they want for renting the 172s at the local FBO.


BS!!! How about engine amorization and maintainence amorization. You can
add about 17 bucks per hour for the engine and about 30 smackers for the
maintainence amorization. With fuel at 4.40 a gallon and 9 gph on average
and through in another dollar for oil you have about 87 to 88 dollars per
hour true cost.

Kobra