Car smoking badly

I have a 1992 Galant with 160,000 miles on the odemeter. It produces a big smoking from the exhausting pipe, particularly at the first time starting in a day.

Is there any feasible way to reduce this unpleasant smoking? Will it help if I use thick engine oil (say 30-50) ?

where in the pipe is the smoke coming out>? like in the middle at the end or what? also describe the smoke. color smell, whatever

I had the exact same problem with my '90. The only way I was able to get rid of the smoke was to get the valve seals replaced.