interesting thing about 0w-20 oils that they are not all equal. Volvo spec has higher 100C viscosity when compared to Dexos or other brand specs.
examples of differences between Volvo spec oils just Visc @100C:
SynPower FE 0w-20 - 9.2
Rowe RSV 0w-20 - 9.0 (HC oil)
Ravenol EFS 0w20 - 8.3 (PAO)
Motul spec RBS0-2AE - 8.8 (HC oil)
LM V spec 0w-20 - 8.8 (HC oil)
other oils
HPL Euro 0w-20 - 8.5
HPL Premium 0w-20 - 8.67
Pennzoil Plat 0w-20 - 8.3
M1 FS 0w-20 - 8.3
****DELETE**** I just realized there most likely going to be 100 or more threads and posts about the ACEA motor oil numbers I was asking about. I will look for them when I can.
Majority of current ACEA Longlife spec or European cars approval are group iii or iv oil because it must hold up to 20k miles/2y OCI.
I found Volvo spec oil is usually ~15% cheaper than VW 508 509 spec oil from the same brand. I am not sure if it is something to do with licensing cost or different level of stringent tests needed. Check Castrol, Ravenol (VSE vs EFS) websites who have them.
@a2gtinut There is specific Dexos, for ACEA oil. DexosD has similar standard as Volvo. Not Dexos1, which is only for gasoline engine.