Re: is this oil ok?
I know of quite a few guys in the ultralight community that exceeded 1200 hours running time on Rotax 582cc watercooled and 503 aircooled engines with this oil. Recomended overhaul on these engines is at 300 hours.
I was always partial to Pennzoil aircooled in mine though. Never was a fan of synthetic oil because it is inferior to synthetic as far as corrosion protection, on engines that aren't used regularly.
Down here in La. In the winter when we have dramatic temperature changes from day to day, that cause everthing metal to sweat and drip water, you can get rusty crank journal from a month of sitting unused.