Originally Posted By: vinu_neuro
I love SOPUS products more than anything else. They're the only ones that consistently hit all the points. Unless you have special needs anti-wear isn't much of a concern these days, they all get it done exceedingly well. The big factors in choosing a product for me are (not in this order):
-Detergency/ deposit resistance (M1 and SOPUS are very good at this, Castrol not as much)
-NVH (SOPUS and Castrol very good, M1 by far the worst)
-Efficiency (they're all pretty good except the Castrol Euro oils in my experience)
-Resistance to consumption. For some reason NOACK doesn't give the whole picture, eg. some conventional with higher volatility produce less consumption. This is irrelevant if your engine family by nature doesn't consume, but many high-performance engines do. (SOPUS and Castrol the best, M1 by far the worst).
-Cost and availability (for non-Euro oils they're all pretty cheap esp on sale, for Euro M1 and Castrol don't have any competitors, esp M1 which you can walk into any WM and buy cheaply anytime).
-Scale. R&D budget. Access to OEM's (not just approvals). The big companies can deliver better products at lower prices. I'll only use oils that are from big companies, in North America that means M1, SOPUS, Castrol.
If my engine didn't use oil I'd use Pennzoil 5W-40. M1 0W-40 is the king of the lubricant world in performance, but Pennzoil 5W-40 has the same important approvals and is better at consumption resistance and is quite a bit better at NVH.
Very interesting comments; some perspectives match mine; and mine reflect a change from my thinking in the past. It IS interesting how, without collaboration, you see board members moving in the same direction on oil preferences. Some of it could be "follow a leader" but I think much is members coming to their own conclusions.