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Old 05-04-2012, 11:54 AM
m6pwr m6pwr is online now
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Location: San Diego, CA
 
Join Date: Jan 2008
Posts: 292
Mein Auto: '14 335i M Sport
I just re-read some of the uoa's in this thread and think they are great. Ekay's uoa (the oil was run to 11,355 mi.) is particularly of interest and confirms in my mind that taking the oil out to the cbs oil change interval is possible. Ekay's uoa is really very good. That oil was in great shape and still had reserve TBN. I'd bet that if Ekay had done a uoa on this oil at around 3 or 4k, it would have been substantially the same, except with higher TBN of course. Just my theory. I'd take Blackstone's comments about the wear metals with a grain of salt. As someone noted above, interpretation of wear metals can be tricky. Even so, the wear metals look great - - even the ppm iron (you should see some of the iron counts on the VW TDI board on euro TDI's which are run to 18k mi oci's).

I hope I wasn't out of line, but I sent an email to the forum admin recommending that this thread be made a sticky, as a central place so we can continue to post our uoa's.
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