This oil is straight SAE140 without the harmfull cleaning agents which are corrosive to phosher bronze. It is formulated specially for classic motors.
It is a straight replacement for Castrol 'D'
TOP TIP: Due to the weight, oil is in one our courier rate band for post, but if you purchase multiples or add it to other parts, postage is capped at this level. ie 10 bottles will be same postal cost as one. (UK only)