What oil for MT 6?

BrianMSmith · 04-07-2010, 05:16 PM

Quote:

Originally Posted by ChrisSlicks

I think people mix the MTL in to make the oil a little thinner for low temperatures and improve cold shifting. MTL has less than half the viscosity of MT-90 below 100 degrees.

MT-90 is 75W90 and MTL is 70W80. So I do not think MTL is half the cold viscosity of MT-90. 70 vs 75.

ChrisSlicks · 04-07-2010, 05:22 PM

Quote:

Originally Posted by BrianMSmith

MT-90 is 75W90 and MTL is 70W80. So I do not think MTL is half the cold viscosity of MT-90. 70 vs 75.

It is. The gear oil weights are weird.

MTL is the equivalent weight of 5W30 engine oil.
MT-90 is the equivalent weight of 15W40 engine oil.

MTL viscosity at 40C : 56 cSt
MT-90 viscosity at 40C : 90 cSt

There's even more disparity at room temperature or below.