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      12-08-2019, 10:58 AM   #1
swainbmw
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Oil analysis

Any one on this board doing extended oil service and doing oil analysis with there x5 diesel ? And how often is the oil service from bmw recommend?
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      12-08-2019, 12:52 PM   #2
gvarr03
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Quote:
Originally Posted by swainbmw View Post
Any one on this board doing extended oil service and doing oil analysis with there x5 diesel ? And how often is the oil service from bmw recommend?
I believe in the iDrive it says every 10000 miles between oil changes.
If you like to keep a car long term, I'd recommend changing oil every 5-6k miles.
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      12-08-2019, 02:09 PM   #3
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I sent oil off to blackstone that had 5K on it. They suggested/ok'd going longer ~7K

My current "test" interval is Filter only change at 5K miles then full oil & filter change at 10K I plan to test the oil again to see what it looks like. If it's bad, I'll moved to a 7.5K Oil/Filter interval and call it done.
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      12-08-2019, 08:43 PM   #4
swainbmw
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Oil analysis

I’m at 25,000 miles on my tdi Jetta with blackstone labs with same filter liqui molly. 5w30 top tec 4200 and tbn is is still half i will be changing oil and filter at 30,000 miles filter is good for 30.000 miles soot is very low . At this time quart and a half of oil was added.
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      12-09-2019, 09:03 AM   #5
ComasF15
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Quote:
Originally Posted by swainbmw View Post
I'm at 25,000 miles on my tdi Jetta with blackstone labs with same filter liqui molly. 5w30 top tec 4200 and tbn is is still half i will be changing oil and filter at 30,000 miles filter is good for 30.000 miles soot is very low . At this time quart and a half of oil was added.
Your car may use a different type of filter to allow extended interval. Soot can be very fine requiring a filter with a 1 micron pass rate. Bypass filters can be separate or built in. TAN/TBN may still be good but without proper soot filtering an oil change may be required.
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