Here is the partial additive pack of Mobil 1 x2 0W-20.
Code
BENZENAMINE, N-PHENYL-, REACTION PRODUCTS WITH 2,4,4-TRIMETHYLPENTENE 68411-46-1 5 - < 10% H316, H402, H412
BENZENE PROPANOIC ACID, 3,5-BIS(1,1-DIMETHYLETHYL)-4-HYDROXY-, C7-9 BRANCHED ALKYL ESTERS 125643-61-0 5 - < 10% H413
C14-16-18 ALKYL PHENOL CONFIDENTIAL 1 - < 5% H317, H373
CARBONIC ACID, CALCIUM SALT (1:1) 471-34-1 1 - < 5% None
ORGANO MOLY-SULFUR COMPLEX CONFIDENTIAL 0.1 - < 1% H315, H317, H402, H412
POLYISOBUTENYLSUCCINIC ANHYDRIDE 67762-77-0 1 - < 5% H413
BENZENE PROPANOIC ACID, 3,5-BIS(1,1-DIMETHYLETHYL)-4-HYDROXY-, C7-9 BRANCHED ALKYL ESTERS is an antioxidant, and it's used by many ExxonMobil oils.
http://www.oxirischemicals.com/en-us/Products-Solutions/IONOL-135-2
ExxonMobil oils listing CAS # 125643-61-0
POLYISOBUTENYLSUCCINIC ANHYDRIDE is a dispersant base, common in many oils. Others are detergents, surfactants, etc.
The point is that there are no magic ingredients in these Euro oils that are not found in ILSAC oils. It's the exact same ingredients in varying concentrations to comply with a given spec. You can find a quality oil complying to either ILSAC or Euro spec, and if you know you're getting a better base oil (such as with M1 EP and M1 AP), you know you can go for a longer OCI. Does that make a difference whether it's a GM TGDI engine or a VW TGDI engine when you select an oil? I don't think so, but the OEMs want to make you think so. If your vehicle is out of warranty, chances are that your engine won't notice the difference if you're running the dexos1 Gen 2 Super Tech 0W-20 vs. the M1 ESP x2 0W-20.
M1 ESP x2 0W-20 has 2.8% VII vs. M1 EP 0W-20 having 4.4% VII according to my estimates. Therefore, in that department M1 ESP x2 0W-20 clearly wins.
Estimated VII content and BO DV150 (base-oil viscosity at 150 °C = HTFS) of selected oils
Moreover, the phosphorus on M1 ESP x2 0W-20 is likely 900 ppm because it's certified for API SL only. Therefore, the ZDDP content is probably the main intended difference between the ACEA/Euro-OEM 0W-20 oils and the ILSAC/GM dexos1 0W-20 oils, and that is why they tend to be mutually exclusive.
Code
BENZENAMINE, N-PHENYL-, REACTION PRODUCTS WITH 2,4,4-TRIMETHYLPENTENE 68411-46-1 5 - < 10% H316, H402, H412
BENZENE PROPANOIC ACID, 3,5-BIS(1,1-DIMETHYLETHYL)-4-HYDROXY-, C7-9 BRANCHED ALKYL ESTERS 125643-61-0 5 - < 10% H413
C14-16-18 ALKYL PHENOL CONFIDENTIAL 1 - < 5% H317, H373
CARBONIC ACID, CALCIUM SALT (1:1) 471-34-1 1 - < 5% None
ORGANO MOLY-SULFUR COMPLEX CONFIDENTIAL 0.1 - < 1% H315, H317, H402, H412
POLYISOBUTENYLSUCCINIC ANHYDRIDE 67762-77-0 1 - < 5% H413
BENZENE PROPANOIC ACID, 3,5-BIS(1,1-DIMETHYLETHYL)-4-HYDROXY-, C7-9 BRANCHED ALKYL ESTERS is an antioxidant, and it's used by many ExxonMobil oils.
http://www.oxirischemicals.com/en-us/Products-Solutions/IONOL-135-2
ExxonMobil oils listing CAS # 125643-61-0
POLYISOBUTENYLSUCCINIC ANHYDRIDE is a dispersant base, common in many oils. Others are detergents, surfactants, etc.
The point is that there are no magic ingredients in these Euro oils that are not found in ILSAC oils. It's the exact same ingredients in varying concentrations to comply with a given spec. You can find a quality oil complying to either ILSAC or Euro spec, and if you know you're getting a better base oil (such as with M1 EP and M1 AP), you know you can go for a longer OCI. Does that make a difference whether it's a GM TGDI engine or a VW TGDI engine when you select an oil? I don't think so, but the OEMs want to make you think so. If your vehicle is out of warranty, chances are that your engine won't notice the difference if you're running the dexos1 Gen 2 Super Tech 0W-20 vs. the M1 ESP x2 0W-20.
M1 ESP x2 0W-20 has 2.8% VII vs. M1 EP 0W-20 having 4.4% VII according to my estimates. Therefore, in that department M1 ESP x2 0W-20 clearly wins.
Estimated VII content and BO DV150 (base-oil viscosity at 150 °C = HTFS) of selected oils
Moreover, the phosphorus on M1 ESP x2 0W-20 is likely 900 ppm because it's certified for API SL only. Therefore, the ZDDP content is probably the main intended difference between the ACEA/Euro-OEM 0W-20 oils and the ILSAC/GM dexos1 0W-20 oils, and that is why they tend to be mutually exclusive.