used in my e46 330ci rear diff. I am sure the original stuff was in there at around 185k miles still. Good piece of mind.

I originally flushed my Front and Rear differentials (325XI) using Redline 75W90ns (I didn't notice the lack of friction modifiers or their significance in the ns version). I then noticed a whining noise which was present both at high speeds and very low speeds. I did some research and replaced the fluids again with plain 75W90 and the noise is gone! Really changes the feel of the car.

I have used Redline products on multiple vehicles, including my Autocross cars and have always had great results