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In my case it failed the first oil consumption test. When the diagnosis was completed it was determined and approved that the turbos and valve guides were to be replaced. My car was burning about a quart of oil every 500 miles and I was getting that tell tail puff of blue smoke when idling for more then 15mins. My 11 550i had about 93k when I brought it in and other then the oil consumption it ran rather well.
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