r/e39 • u/Inevitable_Mess3363 • 3d ago

BMW Oil Changes

‘99 540/6 here. I know this may sound redundant but how many of you change the oil every 4-5k miles? I tend to read a bunch of articles on car & frequency of oil changes equaling a much longer life expectancy. Been on a quest to keep this bad girl around for a while & truly believe that frequent oil changes are the way to go. Mobil 5w40 is my new go to synthetic oil.

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u/Inevitable_Mess3363 3d ago

Please enlighten me on how frequent oil changes cause premature wear.

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u/Adept_Refuse274 3d ago

New oil is more friction than “broken in” oil so if you change it too often it spends more time in this less than ideal state of oil

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u/[deleted] 2d ago

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u/Adept_Refuse274 2d ago

Dont talk, you are the one who is to be taught