Diaqueen (now MZ320345) SAE90 LSD Oil Discussion
Nov 22, 2018, 05:41 PM
#91
I would have to agree with you on it being one of the most supported oils in the evo community. Diaqueen SAE90 is a VERY thick oil. This may not be a good answer to what you're asking, but I personally believe that the reason why it holds up so well is because of how consistent it is under heavy loading. That's gotta be remarkably good for an OEM spec oil.
Where other gear oils have a cold viscosity of SAE75 and a hot viscosity of SAE90, keeping it at SAE90 through the entire operating temperature range I think helps cushion botched shifting patterns and screwd up launches. This is especially important during the warm up of the drive train.
Perhaps there is an undisclosed additive that Mitsubishi doesn't want us to know about? No matter the case, I will continue to run only this oil in my rear diff and transfer case.
-pal215
Where other gear oils have a cold viscosity of SAE75 and a hot viscosity of SAE90, keeping it at SAE90 through the entire operating temperature range I think helps cushion botched shifting patterns and screwd up launches. This is especially important during the warm up of the drive train.
Perhaps there is an undisclosed additive that Mitsubishi doesn't want us to know about? No matter the case, I will continue to run only this oil in my rear diff and transfer case.
-pal215
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Steve_P (Feb 25, 2019)
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