Originally Posted by
FABombjoy
I think that section of the manual is based on theory and not practice :D Seems you'd have to have 6 helluva perfectly sealed combustion chambers for a CC air leak to cause significant shift in mixture. The vacuum felt on the bottom of the oil fill is quickly offset by blowby gasses. Put your hand over the oil fill opening and it doesn't take long to build up! Without any notable pressure differential (as measured in real life!) between CC and atmo, air has no reason to enter the CC.
After all these blowby gas discussions, if we meet at a DCS I'm buying you Taco Bell.