For reference purposes, I am posting the most recent Audi/VW 502.00 approved oil list. This is the standard (I believe) for all gasoline powered engines manufactured by Audi and VW.
Here is the complete list of Audi Approved Oils. Unfortunately the favored GC is not among the list.
Addinol Super light MV0546 5W–40
Addinol Super power MV 0537 5W–30
Adnoc Image 5W–40
Agip Sint Evolution 5W–40
Agip Synthetic PC 5W–40
Agip Tecsint 5W–30
Agip Tecsint SL 5W–40
Gamaparts Gold Synt 5W–40
Antar Excellia LDX 5W–40
Lubricating Oil AnYe 1 5W–40
Aral HighTronic 5W–40
Aral SuperTronic 0W–40
Autol Carrera 5W–40
Bardahl XTC 100% Synthetic Motor Oil 5W–40
Xin Gai Nian 5W–40
BP Euro Germany 5W–40
BP Euro Plus 5W–40
BP Euro Spirit 5W–40
BP Visco 5000 5W–40
BP Visco Sport 0W–40
Bucher Motorex Xperience FS–X 5W–40
Bucher Select SP–X 5W–40
Bucher Xperience FS–X 0W–40
Carat ad–Synt–Oil 5W–40
Dongying Xinyi Xin Yi 1 5W–40
Duckhams Q Fully Synthetic 5W–40
Elf Excellium LDX 5W–40
ENOC Protec X–treme 5W–40
Esso Megatron 5W–40
Esso Ultron 5W–40
Esso Ultron SL 5W–40
Motor Oil Plus 5W–40
Eurol Super Lite 5W–40 SL/CF 5W–40
FAW–Sihuan Petrofer Huan Ya 5W–40
Vert Feu Vert 100% Synthese 5W–40
Fina First 5W–40
Fina Motortronic RS 5W–40
FL Selenia Pulsar S.D. 5W–40
FL Selenia Selenia WR 5W–40
Fortum Neste City Pro 0W–40
Fortum Neste City Pro 5W–40
Fuchs TITAN Supersyn 5W–40
Fuchs Titan Formel MC 5W–40
Galp Formula 1 Plus 5W–40
Galp Formula TD Plus 5W–40
Ginouves York 848 5W–40
Goldhand Budget Motorenöl vollsynthetisch 5W–40
Gulf Formula S 5W–40
Gulf Formula G 5W–40
Huiles Labo Labo Carat 5W–40
Igol Symbol Ceramic 5W–40
Igol Symbol Ceramic 5W–30
Igol Process Compact P 5W–30
INA Futura MB 5W–30
Ina Millennium 5W–40
Kendall GT–1 Full Synthetic Motor Oil 5W–40
Kuttenkeuler Motorenöl S–Tronic 5W–40
Liqui Moly Leichtlauf HC 7 5W–40
Liqui Moly Longtime High Tech 5W–30
Liqui Moly Profi Synthoil 5W–40
Liqui Moly Synthoil High Tech 5W–40
Lotos Dynamic 0W–40
Lotos Economic 5W–30
Lotos Syntetic SL/SJ/CF/CD 5W–40
Lotos Traffic 5W–40
Lukoil LUX 5W–40
Meguin EMARAT Super Synth 5W–40
Meguin megol Motorenoel New Generation 5W–30
Meguin megol Motorenoel Super Leichtlauf 5W–40
Meguin Motorenoel Low Emission 5W–40
Meguin Motorenoel Ultra Performance Longlife 5W–40
Mitan Alpine RSL vollsynth. 0W–40
Mobil 1 0W–40
Mobil 1 5W–40
Mobil Special X 5W–40
Mobil Synt S 5W–40
Mobil Syst S 5W–40
Mogul Forte Racing Pro 5W–40
MOL Dynamic Star 5W–40
Morris Multilife Synthetic 5W–40
Motul 6100 X–cess 5W–40
Motul 8100 E–tech 0W–40
Motul 8100 X–cess 5W–40
Motul Synergie 5W–40
Motul Synergie Ester + 0W–40
MRD Motor Gold Supertec 5W–40
Nocc Valar Gema XLL 053 5W–30
Northland Synergy Synthetic EuroSyn 5W–40
Oel–Brack Midland Avanza 5W–40
Oel–Brack Midland Synqron 5W–30
Oel–Brack Midland Synqron 5W–40
Oest ETA Synthetik 5W–40
Oktanoil Mega Full 5W–40
Ölwerke Julius Schindler Econo Veritas XL–HC 5W–40
OMV full syn 0W–40
OMV full syn plus 5W–30
Panolin Indy SV 5W–40
Paramo Mogul Racing Pro 5W–40
Pennzoil Synthetic European Formula 5W–40
Pennzoil European Formula Ultra 5W–30
Pennzoil Synthetic European Formula Ultra 5W–30
Pentosin Motorenoel Pento High Performance 5W–40
Pentosin Pentosynth 5W–40
Petrobras Lubrax Sintético 5W–40
Petrol Ofisi PO Ultra 5W–40
Petronas Syntium 3000 5W–40
Petronas Syntium 3000 LL 5W–30
Petronas Syntium 3000 S 5W–40
Petronas Syntium 5000 FS 0W–40
Petronas Syntium 900 5W–40
PetroVRC Kunlun HTPC 5W–40
Poweroil High–Tech–Schmierstoffe HD 5W–40 SL CF Topsynth 5W–40
Poweroil High–Tech–Schmierstoffe HD 0W–40
Profi–Tech Profi–Car Synth Tech XT 5W–40
Protech Meister–Öl–Leichtlauföl 5W–40
Quaker State European Formula Ultra 5W–30
Quaker State Full Synthetic European Formula 5W–40
Quaker State Full synthetic European Formula Ultra 5W–30
Rafinerija Modrica Optima Magnum Plus 0W–40
Ravensberger Ravenol Hydrocrack Synth. HCS 5W–40
Ravensberger Ravenol VSI 5W–40
Repsol Elaion Full Performance 5W–40
Repsol Elite Competición 5W–40
Repsol Elite Cosmos 0W–40
Rowe Hightec Synth RS 5W–40 i 5W–40
Rowe Hightec Synt–HC 5W–40 i 5W–40
SCT Mannol Extreme 5W–40
76 Pure Synthetic Motor Oil 5W–40
Shanghai Oil Refinery HAIPAI 2293 5W–40
Shanghai Tempo 8000–1A 5W–40
Shell Formula Shell Ultra AB 5W–30
Shell Helix Ultra AM 5W–40
Shell Helix Plus 5W–30
Shell Helix Plus 5W–40
Shell Helix Plus S 5W–30
Shell Helix Plus S 5W–40
Shell Helix Premium 5W–40
Shell Helix Ultra 5W–40
Shell Helix Ultra AB 5W–30
Shell Helix Ultra AL 5W–30
Shell SL 0914 5W–40
Sinopec Polar Star II 5W–40
SK Corporation ZIC XQ 5W–40
Slovnaft Madit Ultra 5W–30
Smessindo Liqtro Enduro Ultra 5W–40
Spectr–Auto Polarm 0W–40
SRS Schmierstoff Vertrieb Wintershall Primalub topsynth 5W–40
SRS Schmierstoff Vertrieb Wintershall ViVA 1 ecosynth 0W–40
SRS Schmierstoff Vertrieb Wintershall VIVA 1 Longlife 5W–30
SRS Schmierstoff Vertrieb Wintershall ViVA 1 topsynth 5W–40
SRS Schmierstoff Vertrieb Wintershall ViVA 1 topsynth alpha 5W–30
SRS Schmierstoff Vertrieb Wintershall ViVA 1 topsynth alpha LA 5W–30
Startol Synt–XL 5W–40
Statoil LazerWay 5W–40
Statoil GT S 5W–40
Statoil LazerWay 5W–40
Statoil Pro Synthetic 5W–40
SWD Primus HDC 5W–40
Teboil Gold 5W–40
Texaco Havoline Ultra 5W–40
Texaco Havoline Ultra 5W–40
Texaco Havoline Ultra BM 5W–30
Top Top Evolution 5W–40
Activa 9000 5W–40
Total Quartz 9000 5W–40
Unicorn Ultra Synt 5W–40
Unil Opal Opaljet 24 S 5W–40
Unil Opal Opaljet 24S 5W–40
Valvoline SynPower 5W–40
Valvoline DuraBlend MXL 5W–40
Valvoline SynPower 5W–30
Valvoline SynPower 5W–40
Valvoline SynPower motor oil 0W–40
Valvoline SynPower MXL 5W–30
Valvoline SynPro motor oil 0W–40
VAPS VAPSOIL 502 00 5W–40
Vial Oil Consol Ultima 5W–40
Wako’s 4CT 5W–40
Wolf Wolf Masterlube Synflow DC 5W–40
Würth Triathlon Sprint 5W–40
Yacco VX 1000 5W–40
Yacco VX 600 5W–40
YPF Elaion Plus VWS 5W–40
YPF Elaion Sintetico VWS 5W–40
YPF Elaion Full Performance 5W–40
Yukos U–Tech System 0W–40
Zeller+Gmelin Divinol Syntholight 5W–40
Here is the complete list of Audi Approved Oils. Unfortunately the favored GC is not among the list.
Addinol Super light MV0546 5W–40
Addinol Super power MV 0537 5W–30
Adnoc Image 5W–40
Agip Sint Evolution 5W–40
Agip Synthetic PC 5W–40
Agip Tecsint 5W–30
Agip Tecsint SL 5W–40
Gamaparts Gold Synt 5W–40
Antar Excellia LDX 5W–40
Lubricating Oil AnYe 1 5W–40
Aral HighTronic 5W–40
Aral SuperTronic 0W–40
Autol Carrera 5W–40
Bardahl XTC 100% Synthetic Motor Oil 5W–40
Xin Gai Nian 5W–40
BP Euro Germany 5W–40
BP Euro Plus 5W–40
BP Euro Spirit 5W–40
BP Visco 5000 5W–40
BP Visco Sport 0W–40
Bucher Motorex Xperience FS–X 5W–40
Bucher Select SP–X 5W–40
Bucher Xperience FS–X 0W–40
Carat ad–Synt–Oil 5W–40
Dongying Xinyi Xin Yi 1 5W–40
Duckhams Q Fully Synthetic 5W–40
Elf Excellium LDX 5W–40
ENOC Protec X–treme 5W–40
Esso Megatron 5W–40
Esso Ultron 5W–40
Esso Ultron SL 5W–40
Motor Oil Plus 5W–40
Eurol Super Lite 5W–40 SL/CF 5W–40
FAW–Sihuan Petrofer Huan Ya 5W–40
Vert Feu Vert 100% Synthese 5W–40
Fina First 5W–40
Fina Motortronic RS 5W–40
FL Selenia Pulsar S.D. 5W–40
FL Selenia Selenia WR 5W–40
Fortum Neste City Pro 0W–40
Fortum Neste City Pro 5W–40
Fuchs TITAN Supersyn 5W–40
Fuchs Titan Formel MC 5W–40
Galp Formula 1 Plus 5W–40
Galp Formula TD Plus 5W–40
Ginouves York 848 5W–40
Goldhand Budget Motorenöl vollsynthetisch 5W–40
Gulf Formula S 5W–40
Gulf Formula G 5W–40
Huiles Labo Labo Carat 5W–40
Igol Symbol Ceramic 5W–40
Igol Symbol Ceramic 5W–30
Igol Process Compact P 5W–30
INA Futura MB 5W–30
Ina Millennium 5W–40
Kendall GT–1 Full Synthetic Motor Oil 5W–40
Kuttenkeuler Motorenöl S–Tronic 5W–40
Liqui Moly Leichtlauf HC 7 5W–40
Liqui Moly Longtime High Tech 5W–30
Liqui Moly Profi Synthoil 5W–40
Liqui Moly Synthoil High Tech 5W–40
Lotos Dynamic 0W–40
Lotos Economic 5W–30
Lotos Syntetic SL/SJ/CF/CD 5W–40
Lotos Traffic 5W–40
Lukoil LUX 5W–40
Meguin EMARAT Super Synth 5W–40
Meguin megol Motorenoel New Generation 5W–30
Meguin megol Motorenoel Super Leichtlauf 5W–40
Meguin Motorenoel Low Emission 5W–40
Meguin Motorenoel Ultra Performance Longlife 5W–40
Mitan Alpine RSL vollsynth. 0W–40
Mobil 1 0W–40
Mobil 1 5W–40
Mobil Special X 5W–40
Mobil Synt S 5W–40
Mobil Syst S 5W–40
Mogul Forte Racing Pro 5W–40
MOL Dynamic Star 5W–40
Morris Multilife Synthetic 5W–40
Motul 6100 X–cess 5W–40
Motul 8100 E–tech 0W–40
Motul 8100 X–cess 5W–40
Motul Synergie 5W–40
Motul Synergie Ester + 0W–40
MRD Motor Gold Supertec 5W–40
Nocc Valar Gema XLL 053 5W–30
Northland Synergy Synthetic EuroSyn 5W–40
Oel–Brack Midland Avanza 5W–40
Oel–Brack Midland Synqron 5W–30
Oel–Brack Midland Synqron 5W–40
Oest ETA Synthetik 5W–40
Oktanoil Mega Full 5W–40
Ölwerke Julius Schindler Econo Veritas XL–HC 5W–40
OMV full syn 0W–40
OMV full syn plus 5W–30
Panolin Indy SV 5W–40
Paramo Mogul Racing Pro 5W–40
Pennzoil Synthetic European Formula 5W–40
Pennzoil European Formula Ultra 5W–30
Pennzoil Synthetic European Formula Ultra 5W–30
Pentosin Motorenoel Pento High Performance 5W–40
Pentosin Pentosynth 5W–40
Petrobras Lubrax Sintético 5W–40
Petrol Ofisi PO Ultra 5W–40
Petronas Syntium 3000 5W–40
Petronas Syntium 3000 LL 5W–30
Petronas Syntium 3000 S 5W–40
Petronas Syntium 5000 FS 0W–40
Petronas Syntium 900 5W–40
PetroVRC Kunlun HTPC 5W–40
Poweroil High–Tech–Schmierstoffe HD 5W–40 SL CF Topsynth 5W–40
Poweroil High–Tech–Schmierstoffe HD 0W–40
Profi–Tech Profi–Car Synth Tech XT 5W–40
Protech Meister–Öl–Leichtlauföl 5W–40
Quaker State European Formula Ultra 5W–30
Quaker State Full Synthetic European Formula 5W–40
Quaker State Full synthetic European Formula Ultra 5W–30
Rafinerija Modrica Optima Magnum Plus 0W–40
Ravensberger Ravenol Hydrocrack Synth. HCS 5W–40
Ravensberger Ravenol VSI 5W–40
Repsol Elaion Full Performance 5W–40
Repsol Elite Competición 5W–40
Repsol Elite Cosmos 0W–40
Rowe Hightec Synth RS 5W–40 i 5W–40
Rowe Hightec Synt–HC 5W–40 i 5W–40
SCT Mannol Extreme 5W–40
76 Pure Synthetic Motor Oil 5W–40
Shanghai Oil Refinery HAIPAI 2293 5W–40
Shanghai Tempo 8000–1A 5W–40
Shell Formula Shell Ultra AB 5W–30
Shell Helix Ultra AM 5W–40
Shell Helix Plus 5W–30
Shell Helix Plus 5W–40
Shell Helix Plus S 5W–30
Shell Helix Plus S 5W–40
Shell Helix Premium 5W–40
Shell Helix Ultra 5W–40
Shell Helix Ultra AB 5W–30
Shell Helix Ultra AL 5W–30
Shell SL 0914 5W–40
Sinopec Polar Star II 5W–40
SK Corporation ZIC XQ 5W–40
Slovnaft Madit Ultra 5W–30
Smessindo Liqtro Enduro Ultra 5W–40
Spectr–Auto Polarm 0W–40
SRS Schmierstoff Vertrieb Wintershall Primalub topsynth 5W–40
SRS Schmierstoff Vertrieb Wintershall ViVA 1 ecosynth 0W–40
SRS Schmierstoff Vertrieb Wintershall VIVA 1 Longlife 5W–30
SRS Schmierstoff Vertrieb Wintershall ViVA 1 topsynth 5W–40
SRS Schmierstoff Vertrieb Wintershall ViVA 1 topsynth alpha 5W–30
SRS Schmierstoff Vertrieb Wintershall ViVA 1 topsynth alpha LA 5W–30
Startol Synt–XL 5W–40
Statoil LazerWay 5W–40
Statoil GT S 5W–40
Statoil LazerWay 5W–40
Statoil Pro Synthetic 5W–40
SWD Primus HDC 5W–40
Teboil Gold 5W–40
Texaco Havoline Ultra 5W–40
Texaco Havoline Ultra 5W–40
Texaco Havoline Ultra BM 5W–30
Top Top Evolution 5W–40
Activa 9000 5W–40
Total Quartz 9000 5W–40
Unicorn Ultra Synt 5W–40
Unil Opal Opaljet 24 S 5W–40
Unil Opal Opaljet 24S 5W–40
Valvoline SynPower 5W–40
Valvoline DuraBlend MXL 5W–40
Valvoline SynPower 5W–30
Valvoline SynPower 5W–40
Valvoline SynPower motor oil 0W–40
Valvoline SynPower MXL 5W–30
Valvoline SynPro motor oil 0W–40
VAPS VAPSOIL 502 00 5W–40
Vial Oil Consol Ultima 5W–40
Wako’s 4CT 5W–40
Wolf Wolf Masterlube Synflow DC 5W–40
Würth Triathlon Sprint 5W–40
Yacco VX 1000 5W–40
Yacco VX 600 5W–40
YPF Elaion Plus VWS 5W–40
YPF Elaion Sintetico VWS 5W–40
YPF Elaion Full Performance 5W–40
Yukos U–Tech System 0W–40
Zeller+Gmelin Divinol Syntholight 5W–40