[Mgs] Oil Formulations

[Howard Battan]

OK, I have a question about the lack of zinc in the modern oils. When 
checking the Castrol Syntec "classic car" oil website, it shows the oil 
suitable for my '54 TF and for my '57 MGA, but it doesn't list it for post 
1973 engines. Is my '79 MGB engine new enough that I don't need the ZDDP 
protection of the 'classic car' oil?

TIA.

Howard Battan
Anacortes, WA
'54 MGTF
'57 MGA
'79 MGB