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    OK to use GL4/5 when GL5 spec'd

    Thanks for the replies!
  2. S

    OK to use GL4/5 when GL5 spec'd

    Hi everyone. I have a new to me 2018 BMW R1200RT and I want to replace the fluid in the final drive. I ordered some Liqui Moly 75w90 GL5 (2048) hypoid gear oil without limited slip modifiers as spec'd by BMW. What showed up from Amazon was Liqui Moly GL4/5 (22090). I would like to know if this...
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