Where to buy Castrol 0W-30 in CA east bay/San Francisco area

[1SICKLEX]

Originally Posted by TunedRX300

Mike, Castrol or other brands do not put it on the label. Some experts who work in the industry did professional tests and confirmed the formulation change on Mobil to Group III and GC remaining at Group IV. These tests can not be done by consumers (so you have to trust them but they seem credible, backed up by end results - UOAs from end users such as Lexmex and me)

THank you so much. So skip Mobil 1 and find the Castrol GC. I used Royal Purple last time I think that Group IV right?

Thanks to you and everone, I've learned so much about oil!