Quote Originally Posted by oj88 View Post
Group III vs Group IV (PAO). Does it still matter?

Talking only about fully-synthetic oil, there was probably a point in time when PAO base oils were considered the holy grail of lubricants and were actually superior, in a very big way, to Group III and lower base stocks. But is this still the case today? It appears now that the performance gap between Group III and IV base stocks have become so close that the jump in cost choosing PAO appears to be no longer practical.

As cost is a major concern for most people, are the seemingly marginal benefits of PAO enough justification to throw money at it?

Below is an article I read challenging this conventional thinking. Excerpts has been provided if you do not wish to read the whole article.









Source: Performance of Base Oils and Future Trends - The Evolution of Base Oil Technology - Part 3

Comments?
That is true. Grouo III base oils are just cheaper and it makes sense to just develop and improve them than to push people to switch to FULLY SYNTHETIC Oils.

Shell has a new oil that they highlight as purest due to gas to liquid process. It is base 3 as well iirc.

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