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Synthetic Manual Transmission Oil ?? GL4 vs GL5

rweddy
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX

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Please take note:

 

GL ratings are specifications that oils can live up to. They are NOT version numbers. One oil can span GL-3 and GL-4, and GL-5 if need be.

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