I am learning and just getting to understand the VI number in regards to temperature. What I want to do is to get close to the VI of Mazda's OEM 75w-90 MT fluid, but as of yet I have not found the 40 c or 100 c viscosity or the VI number for it. Named "Mazda Original Long Life Gear Oil IS"
Would like to get a close match to 75w-90 GL-4 rated fluid.
Would like to get a close match to 75w-90 GL-4 rated fluid.