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      12-14-2020, 12:16 AM   #36
Spacecpe
First Lieutenant
Canada
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Drives: E90 335i Msport
Join Date: Sep 2014
Location: Winnipeg, Mb Canada

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Id say every 20-30k stock and every 10k tuned. Yes don't play with injectors, i would replace them before they even show signs of failure if i were you. I have 40k kms on mine and changing them right away. If they leak, you will have misfire codes and they will dilute the oil and can cause a lot of issue (detonation/bend rods, rod bearings failures)
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