Hey folks I have searched and searched for some info on this engine. recently bought a Decathlon with a 150horse constant speed prop. On the dipstick it of course reccomends 8 qrts just like the manual, The engine has 600 smoh, good compressions (mid 70's), and runs great. I can add a quart to get it up to 6qrts on the dipstick and fly it for 2 or so hrs and it will be down to 5 qrts, I was wondering if it is blowing some out, and actually holding more than it says on the stick with the inverted oil system(wondering if a quart or two of oil is trapped in the oil system when it sets and doesn't drain into the oil pan). The engine has no leaks or anything, doesn't seem to be blowing out any. just wondering if anyone has any thoughts. sorry for the blabbering but I guess you get the jist of my question. I