This is a modern rubber valve stem seal that can be fitted to all cars from 1960 onwards as a modification to the original cotton valve stem seal (UE7428-BR). 

Castrol Classic 20W50 is a high-quality mineral multigrade engine oil developed specifically for classic and vintage engines. The oil provides excellent lubrication, stable oil pressure and strong wear protection, making it suitable for the Rolls-Royce and Bentley models.