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tractor Dave · 21-05-21, 10:47 AM

Yes, stick with GL4 as GL5 has a high sulphur content which attacks brass synchros.
The genuine Audi Oil is only £10 a ltr. From TPS or your friendly Audi dealer.
Alternatively, the castol stuff is very good.

21-05-21, 10:47 AM	#2
tractor Dave Senior Member Classic Audi Club Member Join Date: Apr 2018 Location: Wales Posts: 1,174	Yes, stick with GL4 as GL5 has a high sulphur content which attacks brass synchros. The genuine Audi Oil is only £10 a ltr. From TPS or your friendly Audi dealer. Alternatively, the castol stuff is very good.