Doesn't our limited slip requires 75W140? That is why I bought it. I also have 75W90 for my other cars. Mine is also severe gear too.

I only use Mobil 1 because it is readily available and cheaper when on sale. Gan't really get the cost down on the Amsoil. Try the 0W20... it is all we need. I am using it on my BMW before I deploy it on all my cars. My SUV uses 5W20 and the car ran great since new...

I read Bob the Oil Guy... and he recommends 0W20 synthetic oils for everyone.