white smoke without coolant loss

[stefanb]

hi

have a 1995 millenia S at 140k miles.

timing belts/water pump have been changed about 1000 miles ago.
besides the smoke, the only remarkable issue is that it starts a bit
delayed. maybe one or two sparkplugs are corroded?

the white smoke:

when i bought it, it would spit a big white cloud when starting. but then it would stop. i read in forums that many millenia S had that and that it should be fine in case it stops after half a minute. it did.

a few weeks back, when i refilled some oil, i might have refilled too much.
it started smoking during the drive.
so i let it drain out 2 days ago. I have driven about 30 miles, but it still smokes.

there are no leaks to my knowledge: i have checked the oil cap, it looks fine. i do not have any coolant loss, it is still full since i bought it.
no leaks on the ground.

but it keeps smoking white. what could it be?

i have read forums and white smoke is always supposed to be an indicator of coolant loss or too much oil. but i ruled out both and it is still smoking.

i am a bit desperate.