Like your HDs, the R18 uses different lubricants for engine oil and transmission so pretty much any "top shelf" oil that meets spec will be just fine. We all have our favorites and just for reference, the current "global" vendor for BMW labeled engine oil is Shell, but in the not so distant past it was Castrol for Europe and Spectro for North America. I usually just grab my "official BMW oil" and filter w/ crush washer when I'm near the shop, but while on trips I do carry the filter and washer and then source my oil from wherever/whatever jobber shop I may be able to do a parking lot oil change. Many BMWs and 100,000s miles also using Mobil 1, Spectro, Shell T6 (diesel oil), etc., etc., and never had any of them cause any issues.
My bike only has 300 miles on it, not sure what BMW will put in it at the 600 mile service. But at around 2500-3000 miles I will switch to redline 20-50 synthetic. I'm in California and it's never that cold here, I'm thinking that blend will quiet down the motor a bit without effecting performance.
Yep, use to be unicorn piss till few years ago. It was actually green in color! I don’t know about others but I’ll pay top dollar for green colored oil!!!!
Joke aside, tread is “engine oil” not cheap or affordable or to meet specs.
Between me and my wife there is 7 BMW bikes in the garage, and 3 kids in the house all under 10!
So in total we are lucky if we manage to put over 1000 miles per year each. Not each bike!!
They are sitting in garage with AC, so I change all fluids and filters every 2 years, for last 6 years. Price of oil doesn’t make difference, my insurance is a killer!!
I wish I can drive more…..