Redline MT-90 synthetic gear oil
Redline MT-90 synthetic gear oil
SKU
SKU
Instructions
Instructions
Instructions are not currently available.
Data
Data
Emissions: Emissions do not apply.
There are no shipping restrictions on this item.
Warranty: none
Share
Redline MT-90 is a great gearbox lubricant for 'boxes that have to work hard. It's not the best choice for street cars because it needs to be up to full temperature to work properly, but if you're doing a lot of track work or need a little more protection for your gearbox it's the one to choose.
Recommended for street and track driven NDs. For street NA/NB/NC cars we recommend MTL.
NB 6-speeds require two quarts, all other Miata transmissions require three quarts (the third quart is used in the shift turret).
Replaced factory fill at 10k miles. Shifting is noticeably smoother - highly recommended! I did need a little more than 2 quarts.
I used this per FMs recommendation on my ND. Transmission was brand new, literally directly from the Mazda dealer. I installed it in my ND and I’m sad to say that my transmission is already going out. I do drive it harder than average and get it hot, which is why I opted for this fluid, however, I do not believe this fluid was the correct choice and I’m very disappointed in the product, at least in terms of the ND.
Per customer, via Ethan, don't publish. Unlikely to change, leaving here just in case.
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.
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.