Sorry, I should have been more specific, 6-10hrs industry rule of thumb average oil usage in horizontally opposed air-cooled aircraft engines. Less is better, to some extent, I typically add 1qt per 20hrs in my IO-360-L2A. I've never added a single at to my o-340 in the year I have owned it...well that might be due to the fact that it's still mounted to the pallet it was shipped to me on!




Pete
CCK-1865-0078
️N9PW
Severna Park, MD
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