engine oil
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i use Mobil 1 Full Synthetic 0W-40 (it says european car formula on the bottle). it's approved by BMW. i made the mistake of thinking that all 5W-30 is the same, and i put mobil 1 5w-30 in there at first. it was very sluggish, and, after about 100 miles, i checked online and found the error of my ways. i changed it with 0W-40 and won't look back, noticeably smoother and rev-happy.
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A few questions: (1) How much oil is consumed ["burned"] over how many miles? (2) How many miles on your 550, and (3) what are your driving habits/style?
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Liqui Moly 5W-30
http://www.liqui-moly.de/liquimoly/p...cument&land=DE
Can purchase on amazon or BAVauto.
http://www.liqui-moly.de/liquimoly/p...cument&land=DE
Can purchase on amazon or BAVauto.
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US spec oils differ from EU oils. The poster above is right, the 5w-30 is not the same spec in US as the EU 5w-30. You can look for 5w-30 European Formula on a 5w-30 or you can use the 0w-40. Or you can just pick up the OEM oil from your local dealer. it is not usually more expensive than the above oil.
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