[cobrin]

to difficult to objectively say best...but what I do know, keeping to the vehicle's oil specifications requirements, turned out to have a great outcome for me. I saw my own engine components after dropping the sump for a leak repair. What I saw was a beautiful clean rotating assembly, no sludge, no deposits, just clean natural looking metal parts. That was using Nulon C3-12 from 120K kms to 270K kms every 15K kms.