In article t,
"Mike Rapoport" wrote:

Don't forget cost of oil change every 4 months or 50 hours, whichever
is sooner.

Where did you get the 50hr/4 month figure?

The 50 hour figure is from the service manual for my cherokee 140.
I don't remember where the 4 month figure is from. But for my 140,
it doesn't cost much more to change the oil 3 times per year rather than
twice.

--
Bob Noel
no one likes an educated mule