So this topic is bugging the crap out of me.
Anybody care to clarify... but if an oil is a group V, it contains esters? The question then becomes, how much of the oil is esters. Correct?
EDIT: Ok I think I answered my own question. It appears group V doesn't mean it necessarily contains esters, but it groups all oils that don't fit into the first 4 groups. It is that esters are grouped into group V oils.
EDIT 2: Would switching to a heavier weight oil have a similar if not the same effect as using a lighter weight, ester oil?
EDIT 3: Looks like Royal Purple's Synerlec technology resembles the benefits of an ester oil. Whether it is an ester, I have no clue. Check it out:
http://www.royalpurple.com/synerlec-oil-additive.html