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    Syntec 5W40, 74K, 9.1K OCI, 2004 BMW 325Cic

    Whats really strange is the oil I used (Castrol Syntec Edge 5W40) had a strange GREEN coolant color to it. Then when I bought the EXACT same oil 8 months later, the GREEN color was not there (it looked like normal oil). The UOA was done on the coolant-colored oil. Any know why the 2 identical...