I 'asked the expert' at castrol.ca if the GC was a PAO (I was bored). Here is the answer I received. I don't think my question was really answered. Opinions?
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Castrol Syntec is a 100% fully-synthetic motor oil, as is the Syntec
0w-30 available from Germany. Synthetic motor oil starts with synthetic
base oil. There are many different chemical processes available to make
synthetic base oil due to advances in the technology of synthetics.
These chemical processes are different than the simple refining
techniques used to make conventional base oils. For conventional base
oils the process is simply a separation and subtraction process. Once
the base oil is separated, the subtraction process cleans and removes
impurities and undesirable compounds, such as wax and sulfur.
Synthetic processing uses select crude components that are chemically
converted to create molecules that are different from the starting
material. Synthetic processing rearranges, builds up and breaks apart
molecules.
This chemical processing produces synthetic base oils that are
engineered to provide consistent and predictable superior performance
over conventional base oil counterparts. Synthetic base oils exhibit
superior performance at both extreme hot and cold temperatures.
Synthetic base oils are then mixed with specialized additive systems
that can be engineered to meet more demanding performance specifications
than what is achievable from conventional motor oils. The combination
of synthetic base oils and choice additive systems offers many benefits
for your engine.
Consumer Relations
Castrol North America
1-800-462-0835
[email protected]