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On diesels according to BMW its 60K which is crazy I just use pipercross and clean it every 10k as its less wasteful then paper.
Its one open to a lot of opinion but IMO its better to either change regularly say 12months /10k or get something like pipercross and clean it regulary
If its due a service get them to read the car then are you using indy or dealers
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F30 335i M Sport - now departed
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