Mobil in UK describes itself as tri synthetic, which I assume is PAO, AN and Supersyn. Other synthetics are termed ester/PAO and Amsoil I assume to be a PAO/ester synthetic. Oil labelking is not very helpful especially the term semi synthetic.

I don't know why the logo is only on the cardboard case. When I get to the shop I will look on the bottles.

The term PAO is unknown to most all consumers so its serves little purpose to confuse them even more.

Here is Amsoil's answer, if this is unacceptable then I don't know what more I can say.

What types of synthetic base oil fluids does AMSOIL use?
As the developer of the world’s first API qualified synthetic motor oil over 33 years ago, AMSOIL has gained more experience than any other oil company in formulating synthetic motor oil. AMSOIL draws from this experience to formulate its products using a full range of synthetic base oil and additive technology. Most AMSOIL products are optimized using a combination of premium synthetic base oils, including polyalphaolefins (PAO) and highly specialized, proprietary esters.

quote:

Originally posted by MikeR:

The term PAO is unknown to most all consumers so its serves little purpose to confuse them even more.

I think that the consumers deserve a bit more respect and credit than you are giving them. Info over the Internet is plentiful and resourceful with easy access like never before. You would be surprise, but folks learned to read between the lines, and/or to fill the blanks where they were intentionally left that way. And they communicate in more ways than ever before. Various snake-oil salesmen forced them to do just that.

[/QUOTE]
... folks learned to read between the lines, and/or to fill the blanks where they were intentionally left that way. And they communicate in more ways than ever before. Various snake-oil salesmen forced them to do just that.[/QUOTE]

OK. You got them - Amsoil! What are competition teams and labs compared to you? What they couldn't do for years you’ve done in a couple of months through just couple of posts and by "reading between the lines". Congratulations!

Having in mind your roots (family name!) be sure that I understand meaning of being “tvrdoglav” or even "bandoglav", something like stubborn for those who do not understand, what you are in this case. I am alike too when I decide to do something in my area of specialization. Similar roots – similar behavior!
I wonder only why you picked Amsoil to perform that “skill”. This time you do not want to accept facts and believe into results obtained through 35 successful Amsoil years and that definitely couldn’t be considered as constructive stubbornness which is essential part of any technology advancement.

So, if you do not believe in Amsoil quality, dislike their organization and way of selling products and have deep reservations about their statements – simply stay away of them and their "snake oils". It’ll be better for you. You won’t be trapped in position to have major engine (or transmission) problems what you are supposing right now.

I am a tankerman and I pump petroleum products on an exxon contract. Exxon employees at the baytown texas facility have told me that supertech is made by the mobil branches of exxon and that it is the same as mobil oil. Also delvac 1 5w40 is made by exxon and is a synthetic oil used on the towboats. As far as supertech oil I can only take their word I have no proof. So if you really want to know I would start with Exxon.

Add a quart of Marvel Mystery Oil with every oil change! Have you heard of this additive? It's been around for years...a lot of motorcycle racers put it in their bikes. I have friends that swear by it, that is significantly reduces engine wear. It is very light oil and sticks to all of the parts after the motor oil has drained off...this reduces wear on the engine at cold start, etc.

MMO is naphthenic oil and some solvent. These are the things that refiners try to take out of the oil before blending. So by adding this to your oil, you are essentially undoing what makes a better oil.