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mobil 1 0w-40

  1. Royal Purple to Mobil1

    General E46 Forum
    Heu guys, I'm about to do my oil change on my 330i. The previous owner had serviced it with RP, I have Mobil1. Is there any need to do a engine flush before switching to Mobil1? Is there anything I should look out for before doing this? I used the search function before I made this topic...
  2. Oil Report: GC and Mobill 1 0w-40.

    General E46 Forum
    Got my 3rd oil report in an email today. This one is Castrol Syntec 0w-30 (GC) that is 5500 miles oil. I used this interval to provide some semblance of a comparison to my previous sample of M1 at this interval. leftmost column is GC (5500 miles). 3rd and 4th are M1 0w-40 (5400 and 8100...