One point to consider though is that unless one happens to be an expert in the rather specialist world of research into modern oil technology as applied to old and worn engines, then one is merely either spouting an opinion or repeating/denying (delete as necessary) others' opinions.
It is perfectly reasonable to ask for opinions as to the suitability of a particular oil; it is equally reasonable to offer that requested opinion. However, it is also reasonable to request - indeed to require - that all such requests and opinions be offered in a single well-identified thread. That thread is located in the maintenance section.
To be honest, I would *love* to see some well-tested and documented comparative oil tests. Unfortunately, these would require such time and expense as to be utterly impractical - I doubt that anyone reading this has the ability to measure (e.g.) the chemical stability of the oil with regard to time, engine speed, engine load, etc. Even a change in fuel consumption with a different oil can only be anecdotal; it's quite likely that a change in air pressure, or a wet road, or heavy traffic, can change consumption by more than the oil does.
The point is - we don't know. We only have opinions, and of course, *our* opinions are the best. So let's share those opinions, in a single place, please.
By the way: the 'fourteen year old thread' is four years old.
Also: of the twelve advantages claimed for synthetic oils on the Wikipedia article referenced above, ten are quoted without reference and one is disputed...
this forum was built on boy racers and oil threads . 
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