just a footnote bmw have stopped selling the very high quality sg oil so i am using castrol act>evo gt t4 20/50 this is actually rated as a SG rating - not a higher rating oil that includes the sg qualifier. might be of interest to someone. But I have to agree with Mr Bakker that largely oil of the right type should do the job fine dont pay loads extra for something your engine does not need, almost all oils have to meet minimum spec thats noted on the container and if it meets the spec of your bike it should do the job. Jake.
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