Hello for now, So: I apologize for having to open a “what kind of oil” thread right now, but: Now seriously : I am proud owner of a beautiful (imho) BMW R 45 (e.g. ’79), with about 49,000 KM on the odometer (and don’t want to switch to anything else, throttle it or something like that) What I’m wondering is: I want to do my old lady something really good at the beginning of this season and do her the very best (if it’s something like that) ibt) Oil – I am a student and therefore not necessarily rich, but my motorcycle is worth something to me. To my problem: I have been searching the forum for a few hours now and have read some treatises about different SAE classes etc., which were also really interesting… the eternal dispute, whether now fully synthetically is really better or whether you should stay with oil just with old vehicles is also always funny… but just like motor technical layman asked (who is now finally confused): Can I take a fully synthetic oil ? Does it have to be a motorcycle oil ? Is there anything I should not take ? I would like to thank you now for the many helpful tips… mfg, Homunk