Diff oil synthetic or regular?

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  • svn2002s
    E30 Addict
    • Sep 2004
    • 472

    #1

    Diff oil synthetic or regular?

    What do the experts say? Can you mix half and half?
  • whiltebeitel
    R3VLimited
    • Apr 2007
    • 2098

    #2
    Don't mix synthetic or dino. Pick one or the other. Synthetic is better for high-heat stuff (track/autocross). If it's just a DD or cruise mobile, dino is fine.
    '89 325i track sloot
    '01 530i daily

    -Enginerd

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