Looking at the Castrol website, they have 0w20 in Volvo (RBSO-2AE), BMW (Longlife 17FE+), and Porsche/VW (VW 508/509, Porsche C20). Other brand typically only made 1 common C5 spec that cover these 3 variants, but Castrol has impressive -66 Celcius pour point for VW/Porsche and typical 204 Celcius flash point for Volvo with gelation index of 6.
Just wonder which from these 3 standards are more difficult to fulfill and why ?
Just wonder which from these 3 standards are more difficult to fulfill and why ?