Engine oil recommended

As a new owner of a Coupe 20vt I want to be sure that I use the correct/ best engine oil. I have asked the previous owner to advise what has been used previously and what is in the engine now for topping up purposes.
I note the original handbook tells me Selina semi synthetic but assume this may have been updated 21 years later?
The last service oil change I believe Selina oil was used.

Have a look at this section of the Basic FAQ's

Thank you, learning my way around this forum.