I'm with Johnny and dnewton: The "engineer" made some worthwhile points which challenge the dogma that "synthetic" is the end-all-be-all. It's dang good (when it's put together well.. not all syns are equal) but it's not always the best choice for every application, nor is every application suitable for extended drain intervals no matter how good the oil.
As to whether they guy is what he claimed to be, it doesn't matter. Even if he's a i-net phony, it doesn't change the facts. Besides, I saw no reason to immediately dismiss the guy as something less than what he claimed to be. I work with engineers all the time. Some of them are brilliant in their work but the worst writers I have ever read, despite having more years of education than Carter has pills. Some can put words together well enough, but there's an art to being able to explain concepts, even concepts you understand intimately in your head, especially when you are trying to explain to people without the same educational and experiential background.
As to whether they guy is what he claimed to be, it doesn't matter. Even if he's a i-net phony, it doesn't change the facts. Besides, I saw no reason to immediately dismiss the guy as something less than what he claimed to be. I work with engineers all the time. Some of them are brilliant in their work but the worst writers I have ever read, despite having more years of education than Carter has pills. Some can put words together well enough, but there's an art to being able to explain concepts, even concepts you understand intimately in your head, especially when you are trying to explain to people without the same educational and experiential background.