Thanks Aroa, not too hot in NZ though... Mid 20's.. I'm running W100Plus. I've got some investigating to do first, oil level was quite low after landing, approx 3/4 gallon. I need to check the suction side of pump for leaks and the pickup etc. Oil burn is a little high, using about 3L an hour and fouling plugs on 1 cylinder on approach so I'm think ring issues...