Russ,In my experience a bit of AVGAS wont cause a problem unless you run it all the time. Yes the O2 sensor will be comtaminated by lead if AVGAS is used to much.Once you get past Warburton then there is plenty of Premium UL avail.Adrian
Adrian has it spot on, I have to run avgas at odd times and there is no problems with the 2.2.Very different story if you run avgas full time as some 912 drivers can testify to.Premium is the ONLY stuff that should be used !! I have gone from one to another a few times now and the difference is real.Adrian.......thanks mate, should only need 3 tanks avgas, then onto premium again.Brian.........difference better with premium, or other way round ??? ( avgas 100 plus.......premium 97ish )Dean.........interesting info..........thanks

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