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I've been using Liqui Moly Special Tec LL 5W30 for 30,000 miles. Oil analysis by Blackstone showed 10,000 mile intervals would be perfectly acceptable. Although I'll continue to change it before then.
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2015 320i xDrive 8AT 3M Pro Series PPF | Suntek Window Film | Mishimoto Oil Catch Can Kit | M Performance Gloss Black Grille |