S6 Gearbox/ Diff Oil

[geneandbolly]

what brand of oils would you recommend that i replace the original (and no doubt destroyed!) gearbox and diff oils with? any idea what the quantities are?

the box and diff are both still silent and i'd like to keep it that way for as long as possible!

thanks!

[andy10v]

Manual says;

Gearbox 2.6 litres, (+supposed to be 0.1l of NLA additive but nobody seems to use it)
G 50 SAE 75W90 GL4

Rear diff 1.5 litres
GL 5 SAE 90

I just went to the dealer, stock stuff has lasted pretty well so far.

Lots of GL4 and GL5 oils available online from opieoils etc.

Be prepared for seized drain and fill plugs, I would have new ones on hand so you can abuse the old ones off if needed. Undo fill plug first.

[geneandbolly]

thanks for that information, andy. i take it that the price at the dealer isn't too tragic in comparison to buying decent oil online? excuse the ignorance but what is NLA additive?

[andy10v]

I cant remember the dealer price, it wasnt great but not silly IIRC.

Sorry the additive the factory spec is apparently no longer available.

This is recommended on here

http://www.opieoils.co.uk/p-739-cast...-s-75w-85.aspx

By a couple of guys

http://www.s2forum.com/forum/showthr...ht=gearbox+oil

If you search "gearbox oil" you will get a load of threads suggesting different oils.

http://www.s2forum.com/forum/search....archid=3163630

Factory re[air manual specs

[popdemonic]

I'm in the same boat.I will receive the 6speed 01E on tomorrow.Whilst searching on the local online store shop for gear oil,I only found GL-5
Brass killer oil spilled over.GL-4 seems to be very hard to get one right here.Last time(40,000kms) i did change the gear oil on my CBD 5speed.
I got 3quartz of gear oil from Dealer for 100quids

I found Motul300 75W-90 GL4/5 , Redline MT-90 GL4 ,Amsoil Synthetic
All of them has been discussed on various perspectives but seems Redline
didn't produce the oil itself.
my lazy solution just for a peace of mind is drain those oil out of 5speed and fill up the 6speed. and save another 100quids

[geneandbolly]

thanks for your help, andy. i take it that this stuff is good for the diff >>

http://www.opieoils.co.uk/p-724-cast...-gear-oil.aspx

is there an alternative to the gearbox additiive now that the original audi additive is no longer available?

[igor136]

In the gearbox gl-4 only

[geneandbolly]

and what about the diff?

[andy10v]

and what about the diff?

GL5

[geneandbolly]

that's it all ordered from the oilman.

what about this gearbox additive, though?

i called aur audi and they confirm it's oboslete but don't have a clue what it was.

does anyone know of a replacement?

[geneandbolly]

i take it that this lucas additive would be ok to use? it says that it exceeds level GL4 . .

http://www.ebay.co.uk/itm/Car-Van-Ad...item3a6f046bf3

[diesel des]

Forget the additive. Modern oil is good enough.

[geneandbolly]

everyone agree with that?

[igor136]

Aha

[popdemonic]

i agreed with Des.additive is no longer required for the modern oil.
typically our car has a 20yrs old gearbox design whilst the new oil
is keep improving and more advancing from day to day.