Hi Stoner and welcome to the forum, I found that this lot are a friendly lot!
I always thought that oil was oil as long as they specifications were right and you are not buying an unknown brand, by that I mean AGIP, Shell, Castrol, Mobil are all reputable as are others. Many oil companies 'sponsor' auto manufacturers to mention their brand in the manual. Renault=Elf, Ferrari=Shell, Yamaha=Yamalube etc.
Just make sure you are getting the correct grade/multigrade, not forgetting the SAE spec, and that you check it often for level and darkness. Too dark change it!