Added seafoam to my vacuum line and my empty gas tank started to run the vehicle

What is your question?

After running the vehicle for about 10 minutes it started to pop and knock the white smoke coming from the engine compartment and knocking made me shut vehicle down following morning while it was cold I started it up and it ran fantastic for approximately 10 15 minutes the same scenario occurred knocking white Smoke stalling out pressure gauge bouncing all over the place I'm wondering if adding seafoam to an old vehicle like that push the problem along a lot faster than expected.I did add seafoam due to the trucks rough running.I've used seafoam 100 X never had this problame.I changed oil thinking I thinned it out with S.F but no such luck..