Okay the above post is finally getiing close
Recheck your valve covers as they were ALL off for the valve adjustment. I am sure you are leaking there.
Also look at the back of your car .. if you are leaking a decent amount underneath the tail and the back of the car will have oil drops or oily residue as the oil gets caught in the slipstream , this is another clue.
Your start up white smoke is probably humidity and moisture burning off . Just because it is stinky doesnt mean it isnt normal combustion gasses from a cold engine. If you think you have valve guide issues have someone follow you and have them watch as you downshift and report back , you might not see it driving it but they will. Also After a hard drive , the next time you start it is smokey then that cold be an indication also , The oil is very thin and when you stop the engine will seep by the valve guides. Dont panic though as this is not totally unusual for a flat engine as you probably know ..
Also the dip stick half way up is a pile of crap that has been around the internet for years. Certainly if you overfill and start taking wicked right handers some will seep over . But under normal conditions you will be fine. In fact Porsche addressed this years ago with a recalibrated dip stick for early cars. people just love to propegate the myth though. but if you have had your 911 for any legnth of time you know this already.
Oh just for other people looking on who are going to argue " the myth" i will attach a pic of the old and recalibrated dipstick. The low mark is the same obviously but the full mark is moved down to address the issue.
My rule of thumb with these is fix what you can see before you fix what you cant see. In other words work on your physical leaks first, then reassess.
All the best and good luck.
