Scooterotica

Hello all,
In a similar vein to the discussion in General Chat I just wondered what everyone's opinions were on using super unleaded and fully synthetic oils. Are they worth paying extra for? Are they in anyway beneficial, especially considering the age and simplicity of my engine or could they even be detrimental? All comments gratefully received.
Cheers,
Joe.

What is your engine?

It's a 1959 factory standard Peugeot 150cc that's been professionally refurbished but hasn't run for 49 years!
Although this wasn't specifically a query about my scooter I was interested in everyone's views in general.

Sorry, forgot to 'search' first.