Should be no smoke at all, is it blue smoke ? How much oil does it use? How many hours on the machine? If it is a broken oil ring then you might not want to run it anymore, could be valve seals , the V ring on the oil separator, over fill the oil, seal gone in the supercharger, too much blow by on the pistons. One way to tell is to remove the intake hose at the manifold and see if there is oil in there, at least it is a start to narrow down where the oil is coming from.