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I don't have much to add; I have never been able to draw much conclusion from a Blackstone analysis which is why I rarely get them done. But in the interests of contributing to the thread, here is my test I had done about a year ago on my 2003 M54. As the test alludes to, I only had 4800 miles on the oil but I went about 18 months between oil changes, so the oil was very old. Normally I don't do such a long change, but I hardly drive this car at all except during camping season because it's such a gas guzzler.
The only real takeaway I have is that it was OK to run that oil for 18 months with so few miles.
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2003 3.0 5MT Topasblau
Purchased in 2016 and sold in 2024
2012 35d Platingrau
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