Quote:
Originally Posted by vanremog
The notion that this has been solved in the F15 N63TU engines is false. Mine failed CA smog at 86Kmi due to long idle visible smoke, despite less than 2qts oil usage between 5Kmi changes. Tried all of the other fixes, but no dice. Your state may pass this, but not CA. Not a question of IF, just WHEN it will happen to you. Getting the stem seals done currently at an indie shop because BMW wanted me to pay $8K portion of $20Kmi engine replacement. They don't want their dealers doing just the stem seal replacement due to tying up their tech time.
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Ya its a 40+ hour job for an experienced tech, expect 60+ hours if you do it yourself. Tools out there to do it you can rent if you want to tackle it. Scale of 1-10, its a solid 8. I am at 185k miles now in mine, 50k miles after doing it myself and still no oil usage so worth it if you want to keep your X5 for the long haul.
As other members mentioned:
Change oil every 5K
Use LiquiMoly 5-40 Leichtlauf oil
Use 2 cans (pre-mix with oil) of LiquiMoly Mos2 additive
Open your hood when parking in safe areas so allow heat to escape
Avoid stop and go traffic if at all possible (take the long way on the highway)
Take off your engine cover