And we're off. Might as well go full-blown oil thread.
Let's cover motorcycles from the 1894 to 2024, all manufacturers; and all engines, gearboxes, primaries, forks, swingarms, speedo drives, bearings, etc.
What difference does it make that this is a thread on when do you change oil and filter (filter implies engine oil) and it's in the Commando forum implying that it means vintage Commando?
OK, I'm often guilty too.