Rating:
100 % of 100
$19.39
Part number
M10-26020
Greater protection for hard-working gearboxes.
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You're reviewing:Redline MT-90 synthetic gear oil
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  1. MT-90 is much better than MTL for my MSM 6 speed.
    Rating
    100%
    MT-90 is the Mazda (and Red Line) recommended viscosity, and I agree.
    The previous owner went with MTL (28000 miles) in the gearbox and I've always found 1st to 2nd notchy until the car was up to temperature.
    I just installed MT-90 (61000 miles) and all is well.

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    Posted on

  2. This is the oil that Red Line recommends for a Miata 5 speed box.
    Rating
    100%
    The oil that Red Line recommends, on their website, for our gear boxes is MT-90 75W90 GL-4 gear oil. Our gear boxes were designed for convention (non-synthetic oils) and the clearances are relatively large, larger than for a modern box. A correspondingly heavier oil works well in our boxes, especially for severe applications and boosted cars.

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