I have over 10 oil changes under my belt on this car, and no issues with stripping. There are a few rules I always follow, some that people disagree with.
1. Always replace the drain plugs at every oil change.
2. Torque the drain plugs with a torque wrench. This is probably the controversial one. I was always taught to never torque a drain plug, and frankly on most cars I never do. However, BMW clearly specifies a torque spec for the drain plugs (25NM), and German cars seem to be super picky with torque specs. Knock on wood, it's worked out well for me so far.
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