A customer sent in his Q-35 for a make run cause it wasn't running right. He was right not much power, so I took it apart and it was just wore out, the chrome was wore through. Ah must be oil abuse, called the customer ans ask what oil he was using. Wanted to add it to my list of junk oil. He said he what ever Wal-Mart had on sale, buy a couple of qt, use it up and go get something else. OK well how old is the engine? Don't know, bought it used about 15 years ago and just fly it every weekend with good weather. It probably had 1500 hr on it!!!!!!
So there is a lot be said for any approved oil at 32:1 Don't sweat the small things.