OK, I agree that oil does not typically burn as clean as gasoline (with all the additives in the oil) but with all due respect to Jim L, most modern two stroke engines REQUIRE synthetic oil (specific to the application, not normal motor oil) to be mixed with the gasoline. I am not convinced that synthetic will burn any differently than dino oils. I went from a Pinz engine that burned a quart every 3-400 miles to a Jim L. rebuilt engine that consumes a quart every 1-2000 miles (and most of that is lost through leaks!). So the consumption through the valve guides should not be significant. I'm sure Jim has seen fouled plugs but I am very suspect that the root cause of fouling is due to synthetic oil.Yup, it's been discussed, Jim L in fact has pointed out that our Pinz engine is designed to have a "small" degree of oil flow past the valve guides. This will result in Synthetic oil burning in the chamber leaving a really crappy residue
build up. That stuck in my head as a don't do ever.
However, my opinion isn't important. I appreciate Ron finding the link, so I know what I missed.