Hi Simon,
Welcome. Its been a long while since I've been on here, but this Self Isolation thing has me looking at all sorts of things to keep me occupied. The oils mentioned above are all superior stuff, and I use Penrite Shelsey oils (Light, Medium & Heavy) in all my vintage cars.
Even the cheapest of oils from your supermarket will far exceed the specifications recommended at the time of manufacture of your Buzzacott. Spending your money on these "better" oils is, in my opinion, a waste.