Yep. That's the spec'd oil. I think it's important to get the right one (75w-140), as the shear loading in the diff is probably pretty high, what with the tremendous HP and torque of the engine, and the high weight of the car. As long as you use oil with a limited slip differential additive package (RP MaxGear already has it; no need to mix it in), it should be quiet, but I worry what wear you'd get if you use the lighter weight lube.When choosing a rear diff. fluid, please make sure to get the 75W-140, not the 75W-90.