To buy the right oil you need to know SAE Viscosity Grade and API Quality Index oil for diesel or gasoline engine. You can select any Brand from the listed.
Example: for gasoline engines Renault Torino (1st generation) 1979, suitable multigrade mineral oil 15W-20 quality SJ, SH.
For bodies made in 1982, for the cold season, well suited mineral 10W-20 \ SJ, SH.
If possible, check the selected oil for compliance with the manufacturers specifications and service intervals.