Smoking 318 need some ideas why?

PCV valve (crankcase ventilation system) test: With engine at idle remove breather and plug the hole in valve cover. You should feel vacuum build, but the idle speed should not change much. If no vacuum builds, the PCV may not be working. If pressure builds the rings are leaking A LOT of compression (blowby). If vacuum builds but the idle speed changes, the engine has internal vacuum leakage either through the guides or ports.

My suspicion with your engine is stuck rings, and/or rings that never seated properly Do an oil change and drive the vehicle regularly. This should clear up in time. A Seafoam treatment may help.