All current "GC" oils:

Below are all current (February 2005) Castrol oils recommended by Audi (Audi Germany per Audi document). On the equivalent VW document, Castrol is not being mentioned. You can see the scans of the two documents on the second page in this thread:;f=1;t=000034 VW 504.00, VW 507.00: Castrol SLX LongLife III VW 503.00, VW 506.00, VW 506.01: Castrol SLX LongLife II VW 505.01: Castrol 505.01 Audi Motorenöl G052 167 VW 502.00, VW 505.00, VW 503.01: Castrol FORMULA SLX 0W-30 (The Elvish one) [Cheers!] VW 502.00, VW 505.00: Castrol TXT SOFTEC+ SAE 5W-30 VW 501.01: Audi Motrenöl G052 167 (This number appears to be a typo on the Audi document, as this part number is identical with the one for VW 505.01 -- they'll never get it 100% correct. [Razz] )