I've pumped back fuel plenty of times and reused fuel as well. I've never put in After run oil, I did add some Castor to my Omega mix for some extra protection but have recently started using coolpower with no castor at all and I still don't add after run oil. But I fly every weekend and sometimes on weekdays.

I've never had a dead stick landing and i've run about 3 gallons through this engine.

I was running rich, really rich on the Low speed needle side of things. Since I've adjust that, The engine found another life. The pickup from idle is excellent, I can let it idle for as long as I want and it picks up rpms right away when I increase throttle.

I no longer have the varnish on my parts I used to get by running rich with castor fuel either.... Just tune it right, I get the feeling it's the tuning.