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Originally Posted by GratefulM5
BMW of Dallas used 5W-30 for my LCI breakin service about 2 months ago. Takes forever to warm up now but it gets hotter than sin down here more often than it's cold! I may request 0w-30 for my mid cycle 5k oil change coming up in a month or so.
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I live in South Florida and I found 0w-30 to be better in summer too. You will notice engine sounds noticeably smoother.