Well thanks for the information. Would anyone be able to direct me to an auction site which has the oil pump with the extra feed? Obviously I don't want to buy another oil pump which I don't need. The oil pump I'm after has the extra oil line: http://i.imgur.com/EaY8eD7h.jpg It appears that TuckerBag's mate was in a similar situation as me with a missing oil pump. I guess I'll run premix as a temporary solution.