To say we had a "best oil ever" would be impossible for the following reasons:
1) having one oil means there are no alternatives; that's simply impossible to make the masses happy by removing all choice
2) it's impossible to make one lubricant that would satisfy all applicable conditions
Hence, the thread mantra itself self-implodes; cannot exist.
Would that leave much room for any remaining conversation, if you have a best-oil-ever?
Seriously, if it did exist, then what would you all have left to proselytize about?