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Old 10-30-2018, 10:26 AM
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DBU DBU is offline
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Location: Orange County, CA
Join Date: Dec 2005
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Mein Auto: Glacier Silver X4 M40i
Originally Posted by timgray View Post
The preventative maintenance is simple. Change your oil.

it seems that most cases where the chain guides failed was people doing extended oil change intervals. Change your oil every 7500miles with 0W40LL01 and you will be golden.

Note 0W40 is the new recommendation for N20 turbo engines from BMW themselves. and LL-01 is still currently the best lubrication standard as reported on reliable oil analysis sites.

The percentage of chain guide failures are very low compared to the number of N20 engines on the road. Remember, BMW has stupid long oil change intervals. Get an oil analysis done and then remove a few thousand from their recommendation for a safety margin.

I'm at 7500 miles as that is a every 6 month oil change for me.
OP should NOT be using LL-01 oil - he drives a diesel.
His: 2017 X4 M40i - Glacier Silver with all the options (except cold weather stuff) - not needed in SoCal
Hers: 2015 X4 28i - Glacier Silver - loaded M-Sport
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