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I am seeing a decrease in engine oil
pressure! About to stop flying
and start tearing the engine down.
More information:
RX8 Renesis 4 port in RV-7A. 670 total hours in
flight. I fly at least 4 times a week. Mostly very short flights - 8
to 10 minutes each way to play tennis. I use Mobil 1 oil (15 - 50
W). I change oil at 50 hours. Check oil filter media for particles
each time. Burn regular mogas with ethanol and add 0.6 oz/gal oil ( 2
stroke outboard and marvel mixed ).
Over the past 100 hours my oil pressure has slowly
decreased from 80 psi to as low as 72 psi in cruse. Oil temps are about
180 deg. F. Idle oil pressure is 50 - 53 psi at 1500 engine rpm
when I land.
When I inspect the oil filter media I find only a
very few shinny particles on the oil filter media and have not seen an increase
in number. I have to look win direct
sunlight to see them.
Is there anything I should be looking at - oil
pump, oil pressure regulator - ???
I'm contemplating taking off the oil pan this
weekend. My oil and water radiators are mounted under the engine so this
will take some time and be messy!
Thanks for any and all info.
Dennis Haverlah
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