Thanks for the responses. I didn't realize the smell difference was related to GL4 vs GL5. I remember changing the differential oil in my RWD pickup after 80,000 miles and how smelly and black it was. I'm sure that's what you're talking about. So do the universal type oils like valvoline or penzoil ...

Hey All. My daughter just bought an '06 with 5 speed manual, with 112,000 miles, from a used car lot. After reading up on this forum I ordered some Redline MT-90 and went to change it. I jacked up the front end till the wheels were a few inches off the floor and opened the fill plug. I was surprised...