Valve Gaskets Replaced...

[Nik]

Hello again guys,

So about 4k miles ago I've replaced Valve Cover Gaskets, upper timing gaskets, and some more gaskets in valve covers... anyway my oil consumption is still High! I saw some leaks on bottom of valve covers and am wondering what could it be? Washers havn't been replaced, maybe that could be the problem?
BMW E53 X5 M62 4.4L > Search > 11121437395 > ES#18148 Valve Cover Seal Washer - Priced Each - 11121437395
BMW E53 X5 M62 4.4L > Search > 11121721879 > ES#18250 Valve Cover Seal Washer - Priced Each - 11121721879
I also washed the car and tomorrow I am going to inspect it from underneath. thinking PCV(I have alrady) should be replaced? Or should I order PCV valve itself? how would I know if it's damaged? some tell me that High sound on cold starts is PCV valve problem. I will also check the Oil pan itself.
Also about oil I use,
Previously I have used Castrol Edge sport 10w-60 and Castrol Edge 10w-60M motorsport(For M engines)-just because in Georgia everyone uses it in there X5s and even almost all mechanics reccomend it. Anyway after discussion on Xoutpost I plan on chaning it. My 10-60 has only 4k miles on, and I would like your opinion on should I right now remove it, let it be for at least 10k miles? or let it be there for til next oil change?
Right now I am thinking what to use?
Motor Oil and Lubricants Castrol UK - Castrol Magnatec - Magnetic 5w-40 or
Motor Oil and Lubricants Castrol UK and Ireland - EDGE 5W-40 - Edge 5w-40?
I drive the car calmly in city most of the time, but I do Like redlining it from time to time in Sports mode putting 220 on speedometer.
It is 00' M62 with 140k Miles. Runs great, I have relay of alternator that has to be changed as of now, and Diff chain that is streched.