While in the process of rebuilding my Raven Twin I'm taking the opportunity to carryout an oil change.
I'm using a complete kit that came with the bike when I picked it up secondhand last summer. Now the thing that I'm not sure about is the colour of the new oil, it is the same black colour as the old stuff I drained out. I suspect that there is no problem, after all why should the previous owner give me a container of old oil? However I'd certainly feel happier about continuing the service once I'm certain that there is no problem with the oil I have.
BTW, I've ground to a bit of a standstill with the tandem rebuild as I seem to have lost one of the stepped flutes used for the cables when SS couplings are required. Once my next delivery from SJS arrives I'll be able to finish fitting the Rohloff cables, rack and rear mudguard and then she's done.