Motorex 10w50. Though I will be looking into that ELF oil someone posted earlier. Their oil works extremely well in VW TDIs going up to triple the factory drain interval. (continued oil performance verified with UOA, something I will start doing with my bike eventually) Mobil 1 makes an excellent oil (it is all I run in my TDIs and recently sold Diesel 4runner), but only being able to find their stuff in a thinner-than-spec viscosity worries me in a climate as warm as central texas, especially in a type of motorcycle with known oil pressure issues at idle.
My personal decision is to ONLY use specifically motorcycle-rated (JASO-MA or MA2) oil in my bike. Both because of the wet clutch, and the significant shearing effect a combined transmission has on the engine lubricant. MA/MA2 oils are designed for both of these features.
bloc screwed with this post 11-16-2012 at 08:35 AM