C20let engine oil

Hi I'm trying to get a c20let nova back on the road after being off it for about 10 years. It going to need an oil change what oil would you lot recommend for it thanks.

Fully

Thanks just some are saying 10w-40 semi synthetic

If it's not been used for 10 years use fully for your first change to get everything well lubed

Thanks. Would you use 10w40 fully then