Hi.
I am using Motul 300V competition, full synthetic, competition oil. It is a 15W50, above existing standards.
With it you should be carefull not to WOT till the engine is at normal operation temperature, but after that.... WooOt.
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I used to run on semisynthethic oil (10W40) or somethingm and I was putting almost 1/2 l oil for 1 l gas
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, not to say it ruined my crankshaft bearings.
but this is just me.