Online cost of airplane ownership spreadsheet

"Bob Noel" wrote in message
...
In article . net,
"Douglas Olson" wrote:
Don't forget costs of upgrades.

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

Bob Noel
no one likes an educated mule




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

I got the 50hr or 4 month recommendation from Exxon for oil change and the
stated reason was that oil has the capibility of suspending some water and
after 4 months it would become saturated and corrosion could then begin. I
recently change the oil in the Helio after five months with infreqent flying
and the oil analysis said "water=0" I am wondering if the four month
recommendation applies as much to airplanes which are hangerd and subject to
minimal temperature variation.

Any other opinions?

Mike
MU-2

Mike Rapoport wrote:





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

I got the 50hr or 4 month recommendation from Exxon for oil change and the
stated reason was that oil has the capibility of suspending some water and
after 4 months it would become saturated and corrosion could then begin.

Many people recommend 25 hours if you have no filter.
It's what the service information on my plane says.

"Ron Natalie" wrote in message
m...
Mike Rapoport wrote:





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

I got the 50hr or 4 month recommendation from Exxon for oil change and
the stated reason was that oil has the capibility of suspending some
water and after 4 months it would become saturated and corrosion could
then begin.

Many people recommend 25 hours if you have no filter.
It's what the service information on my plane says.


That make perfect sense but what Exxon is recommending is 4 months maximium
regardless of hours.

Mike
MU-2

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