Originally Posted by sloinker
...Amsoil was using PAO and Esters exclusively in its products it shouted it out to the world in its advertisements. Now its more of a smoke and mirrors marketing style to make you believe that the oil is still PAO's and esters and not class III based with a dash of the more expensive synthetics which I believe it has become. Problem is you can't really be sure and it varies from product to product. Is Amsoil a superb oil? Is it more superb than Walmart synthetic? Don't know without transparency and that is one thing Amsoil is not, transparent in its ingredients.
I have a slightly different view of this.
When Al Amatuzio claimed his API 10W40 was 100% synthetic he was telling the truth as it was about 87% diester (Group V) base oil with the rest being additives. Secondly, there were no other competitors who could claim this.
When Group V oils became more expensive, he admitted publicly they were shifting to majority PAO's for their FS products. When other competitors started coming out of the woodwork it was important to really hold the formulations close, so the proclamations became less about base oil content or % and more on finished product performance.
No, and I repeat NO oil blender is going to tell you their formulations are, and they are under no obligation to do so.
Therefore, NO blender is going to tell you what their formulations contain.