Sometimes I get white smoke. Happens most often when I accelerate from standing still, or RPMs are below 3000. Car is running at normal temperature 190-200 degrees. No signs of head gasket leaks or enging block cracks. Friend says it needs a carburator adjustment.
White smoke means water or moisture in the combustion chamber. It may be from a tiny leak now that is hard to find, but will get worse as you go.
Coolant, i.e. water, escaping from an engine in the exhaust as steam will dissipate quickly and disappear while oil smoke will remain visible quite a while in calm air. The odor of oil and coolant are quite distinctly different, also. And a rich mixture will cause oil smoke but usually black smoke will be seen often before the resultant oil smoke.