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0W-40 is the euro oil weight recommended for bmws. There is NO benefit of using this over 5w-30. They both cover the same temperature ranges. I use euro formula because I want to use Amsoil and that's the oil they make that's suitable for BMW. Your service guy is whack.
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2016 340i XDrive, EBII/black, 6 MT, M Sport, Track Handling, Cold Weather, Tech, Lighting, Driver Assistance Plus.
2012 Z4 35i, ED 2/24/2012, Melbourne Red Metallic, Black Leather, Carbon Trim, 6MT, M Sport, CW, PP, PS, NAV, CA.
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