To continue this thought, non turbo deuces have a tendancy to slobber more than turbo deuces at idle. Idling below 1000-1200 RPM for extended periods is asking for exhaust slobber, just the nature of the engine design. Now, if your turbo multifuel is not idled much, I think you have a turbo seal problem. If that is the case, replace it or have it repaired now. if you leave it, the bearing can fail and when the impeller hits the housing, parts will go into your combustion chambers, not good. Or, if the inlet side seal goes, your engine will runaway on tthe oil entering the combustion chambers, also not good. These are worst case scenarios, but, if your luck is like mine................................ The out come isn't good