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I never heard of oil change on my s28i until 10k miles.
I changed it to Mobil 1 0w40 at 5k miles and analyzed oil.
The sample showed almost no metal like some breakin's on other cars.
I know BMW keeps changing their mind about oil changes, but the oil they use is very good, and I'll go 10k easily on my next BMW if they don't require it earlier.
Oil and engine is good, just change when BMW tells you for warranty.
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