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just looking for a light casual poll on oil changing -

as I get it, "convention wisdom" is 25 hours w/o filter and 50 hours w/ filter.....

but if you read Vissers' Voice in AvWeb (and I respect this fellow - a career av. petroleum engineer with Shell, now retired, with whom I have conversed), I recall him recommending 25 hours filter or not [if my memory is working]. I added a filter to my C-85 about 20 hours ago. All tach hours by the way - any comments about tach vs. Hobbs timing to kick in as well??

So,  what you y'all think?

Jim B

...I guess I'm leaning for between 25 to 50 as the situation and season feels like -e.g. I'm contemplating OSH, so I figured I'd run it up until into July and then change a couple weeks before, and see where I was after. Kind of like I do with my cars - try to balance common sense with recommendations.

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