just wondering whats the best oil to get the smoothest running engine on the ford 1.6 zetec
castrol magnatec 5w30 or the ford formual f 5w30?
also is this castrol magnatec any good or is it just a sales ploy and is the ford formula f the best oil for the focus?
i like the idea of the partcles in it sticking to the engine parts for quiet running and protection on cold starts but does it actually work or as i day just another sales ploy??