I want to change the manual trans gear oil in my B7 S4. What would the recommended gear oil be? Would the Delvec 1 75 - 90 that I use in the porsche be Okay?

 

I would go with either Redline or Motul for the Audi.

 

Thank you for the advise on the other brands. I have Delvac 1 on hand. Do you think the Delvac 1 75- 90 would be ok?

 

Just thought I would share what I have learned over the last couple days. Kai was spot on with Redline and Motul. The Delvac while an excellent gear oil for the porsche is a no no in the audi. Funny as it sounds the delvac is too slippery. The best choices are the OEM, but at $38 a quart a little hard to justify. Motul 300 gear oil and Redline MT-90 are great alternatives. I was able to purchase the Redline locally on a Sunday so that's what I went with.