Originally Posted by Poe
I figured since it's a dry clutch and the engine oil is kept separate from the transmission oil, you could safely run any common "car oil" in the proper weight
The 1150 is, for all practical purposes, a car engine. Use any oil that fills the requirements.
I have used 10w-40 in winter and 20-50 in summer for a decade (and more than 100.000 miles).