mt-90 or mtl for 1999 miata ???

[MARCUSBEAR]

need a little feedback on which tranny fluid to use from redline .. live in south florida so i am leaning towards the mt-90 .. what i have read the gl-4 is better for brass parts but the owners manual states either gl-4 or gl-5 is ok ..thanks for any input ..

 

[sprintman]

Email Dave Granquist Redline Tech for the best answer

 

[unDummy]

Your Florida weather doesn't need the improved cold shifting of MTL. MT90 is what I use in my Rx7.

Read your owners manual. MTL is a substitute for ATF/MTF/motoroil in manual transmissions.
MT90 is used in place of 75w or 80w90 gear oils.

 

[Spector]

Both the MTL and MT-90 are GL-4

As to which one, well they are differnet weights, what does the owner's manual call for, if shifting fine go with that weight. If hard to shift when tranny cold(hard to find in your climate) mix the two at 50-50 for smoother shifting. I went from the MT-90 to the 50-50 mix and it improved my shifting considerably.

 

[porterdog]

5 speed or 6 speed? They're made by different mfgs.

I've used both in my '94 (5 speed) and prefer the '90, even in the cold.

$0.02,
Robert

 

[MARCUSBEAR]

5 - speed .. I e-mailed redline waiting on a reply...