timwinters
Ejection Handle Pulled
Interesting Oil Temperature Anomaly
Edit: Changed title from "oil pressure" to "oil temperature"...brain fart.
Data:
1958 C182A
O-470L with prox 1200 hours
F&M Oil Filter Adapter (pistol grip style)
Aeroshell 100W (typically)
My plane experiences higher than normal oil temps immediately following an oil change. Not after every oil change but probably after 80% of them. This is what happens:
On the initial climb out after an oil change the temps will be 20dF higher than normal. They'll run 200* to 215* when typically they'd be at 180* to 195* depending upon the OAT. Then, in cruise, the temps will settle in at about 185* or 190*, again 20* higher than typical. At some point in time during that initial flight, the issue will go away and the cruise temp will drop to 170* ish.
And once this "bubble bursts" then 185* during climb and 170* during cruise is the norm until the next oil change.
But, after my last oil change, the issue (higher than normal oil temps) hung around for about 8 hours of flight. We did my BFR late last month right after changing the oil and I didn't see less than 200dF the entire ride (it was a HOT day). It was still high during a couple of flights earlier this month, and also when we flew down to Gaston's and during my IPC. During all these flights the climb temps were 200 to 210dF and cruise temps 180 to 190dF.
Then, last Sunday when I departed Gaston's, I climbed at 100 mph all the way to 9,500' and the oil didn't even make it to 185dF...and it settled in at 165* in cruise. And it wasn't a cool day. Back to "normal".
And it'll stay there until I change my oil again.
Ideas? And not just ideas on why it hung around longer this time but why is it doing it at all?
I have my thoughts but admittedly don't know the intimate details of the inner workings of aircraft engine oil systems.
One BTW...redline is 225* and I never see this, although we came close during my BFR. We got up to 220* once.
Edit: Changed title from "oil pressure" to "oil temperature"...brain fart.
Data:
1958 C182A
O-470L with prox 1200 hours
F&M Oil Filter Adapter (pistol grip style)
Aeroshell 100W (typically)
My plane experiences higher than normal oil temps immediately following an oil change. Not after every oil change but probably after 80% of them. This is what happens:
On the initial climb out after an oil change the temps will be 20dF higher than normal. They'll run 200* to 215* when typically they'd be at 180* to 195* depending upon the OAT. Then, in cruise, the temps will settle in at about 185* or 190*, again 20* higher than typical. At some point in time during that initial flight, the issue will go away and the cruise temp will drop to 170* ish.
And once this "bubble bursts" then 185* during climb and 170* during cruise is the norm until the next oil change.
But, after my last oil change, the issue (higher than normal oil temps) hung around for about 8 hours of flight. We did my BFR late last month right after changing the oil and I didn't see less than 200dF the entire ride (it was a HOT day). It was still high during a couple of flights earlier this month, and also when we flew down to Gaston's and during my IPC. During all these flights the climb temps were 200 to 210dF and cruise temps 180 to 190dF.
Then, last Sunday when I departed Gaston's, I climbed at 100 mph all the way to 9,500' and the oil didn't even make it to 185dF...and it settled in at 165* in cruise. And it wasn't a cool day. Back to "normal".
And it'll stay there until I change my oil again.
Ideas? And not just ideas on why it hung around longer this time but why is it doing it at all?
I have my thoughts but admittedly don't know the intimate details of the inner workings of aircraft engine oil systems.
One BTW...redline is 225* and I never see this, although we came close during my BFR. We got up to 220* once.
Last edited: