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Originally Posted by Brad Roberts
Still not sure why this is considered normal? This is not a dry sump 911 engine where the oil drains back into the case overnight and can get up above the cylinder level and make its way past the rings. The oil in our cars IS IN the bottom of the block all the time. It *should* not be making it's way into the base of the cylinders and past the rings.
I call BS. I call internet BS. This "situation" can and does happen with air cooled 911 dry sump engines.. but it should NOT be happening with the water cooled engines. It is also VERY VERY rare on the 911 engines.
Prove me wrong.. please.. 
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I don't know Brad, both my Boxster and 993 have randomly smoked on startup since I've owned them. Both cars can go weeks or more and then I'll go to start one of them and I get the smoke. My understanding is that both engines, whether air or water cooled have oil sprayed into the cylinder underneath the piston for cooling and lubrication. It's the oil in the cylinder on shutdown - and the horizontal layout of these engines that allows that oil to slowly work it's way past the rings and burn on the next engine start.