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Miata Mailing List: July 1993, Message #20
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From: Mike RotherSubject: Transmission Oil Date: Fri, 2 Jul 1993 09:27:43 -0400
My Miata is at the dealer to have its transmission oil drained & replaced. I pointed out that the manual recommends GL-5 80W-90 gear oil, to which the service person replyed: "We put in 80W-90 or ATF - depending on what comes out of the transmission." The service person went on to explain that many Mazdas (incl Miatas) come from the factory with ATF in the manual transmission - to make cold-weather shifting easier. What do you think of this?