"What is different from an additive package in this example, to an additive package you find in a popular oil such as Castrol GTX. The reason I ask is you can purchase GTX, for almost the price of this additive package. Are there additional Esters than those listed on item 2? "
First , additive packages are tailored for the type of base fluid or combination of base fluids to be used. And yes, some additives are in ester form, but I was attempting to define bases fluids composed of only PAO and esters with a separate additive package.
Why does the additive package cost more for a synth than say for a GTX-type oil? (a.) Additive packages are tailored for the type of base fluid or combination of base fluids to be used, and, (b.) most full synthetic formulations are designed for extended drains or racing service.
The GTX oil is an over-the-counter (OTC) oil NOT expected to give service past 3-5k. Therefore, why put an expensive additive package in this category of oil?!? Why place an expensive additive package in a base oil (GI and GII) that has oxidation and other longevity issues such as volatization?
Edit: BTW, this is not to say that GTX is NOT a good OTC dino oil. It simply has its limitations and expectations as well.
[ January 14, 2003, 05:10 PM: Message edited by: MolaKule ]