S4 gearbox oil?

[Tuffty]

Does anyone know what oil should be in a s4 6 speed and diff? and what about the rear diff?
I know these arn't really service items but i've come from the world of evo's where you have to change them every 2 miles so i'm kinda in the habbit of over servicing cars.

 

[Broken Byzan]

75/90 full synth i just put in my 6 speed. Its a millers oil i used and they are known to be good( should be @ £10 per litre,lol )

 

[smitch]

Not sure about the best oil for Audis but i put some Swepco gdearbox oil in my old '77 911 and it transformed the clunky old 915 gearbox.

 

[jonnya]

You need 75w90 fully synthetic. The manufacturer specifies GL4 but you will probably
be better off with GL 4/5 (note, NOT plain GL5 as the EVP additives in GL5 will eat your
synchros). I've hear good things about Millers CRX. However, a lot of places will tell you
to just go OEM. Speak to someone like MRC and see what they recommend.

 

[Tuffty]

I used millers CRX in my Evo and found it to be good, but to be honest for the sake of messing about finding one which will do the job I may as well just buy the OEM stuff, just as well I get trade at £12+ vat per litre tho !