Oil change

[Dave S]

Just my opinion....I'd stick with the recommendations Rotax has developed for oil & filter change intervals.

They pretty much know their engines.

Sincerely,

Dave S

[kitfox5v]

Do not re install an oil filter. The filter gasket is designed to swell with engine heat to seal properly. If you re install it , it may leak during flight. Do you really want to risk yourself and you plane for a few bucks. I would never do this on my farm equipment and it stays on the ground. Just my .02 worth.
Eddie

[Dorsal]

I change the oil every 25, filter every 50 and disassemble and clean the tank every 100. As I understand it the reason for the 25 hour changes is to deal with the lead that gets picked up in the oil. Not sure that much lead gets picked up in the filter so every 50 seems reasonable to me. When I cut my filters they seem clean and happy. I use a quick drain on the oil tank so the 25 hour changes take about 5 minutes.