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      04-21-2019, 09:50 AM   #86
spazzz
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Drives: 2008 535xi MHD&XHP
Join Date: Jul 2015
Location: Madison,WI

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Quote:
Originally Posted by adc100 View Post
I am kid of an oil freak. I was a maintenance supervisor in a Power plant my whole life (Mechanical Engineer)Done lots of oil analysis both work related and for my cars.

Viewing thousands of oil analysis on BITOG.com. I have pretty come to the conclusion that oil is oil.

My choice now however. QS Ultimate Durability. As far as filters Fram Ultra. This filter has a 99% efficiency at 20 microns. Most filters (if they actually publish their ratings are 99% at 35 to 40 microns.

GM did a test some years back and indicated a 40 micron filter had 3.4 times the wear as a 15 micron filter. Filter is more important than the oil IMHO.

https://www.machinerylubrication.com...ose-oil-filter
Interesting. I use the Fram Ultras in the other cars, the BMWs get the Mann.
I didn't realize the Ultras came with the o-rings and crush washer until now.
On amazon the fram is over 2x the price as Mann.