Quote:
Originally Posted by Bdc101
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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Rod bearings on BMW engines of this era are made up of:
- Lead - top sacrificial layer
- Copper - middle layer
- Steel - base layer
All 3 of those metals are elevated in your sample report - you can draw your own conclusion.
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2004 X5 3.0i
Born 02/04
Delivered 03/04
Last edited by dkl; 07-30-2021 at 03:30 PM.
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