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I originaly thought so but jumped into my oil salesmans 03 Ex to move it the other day and his overhead read 20 mpg!!! He has had one on since new and has 126K on it with NO engine issues! Says on the highway in the summer if he keeps it at 2000 rpm he has seen 22-23 mpg! BTW, He don't sell these. Just Schaeffers oil which we use in all of our heavy equipment...............
As I understand it, it's a filter for the PCV system and it sperates oil from combustion gas. I would venture to guess it's mostly snake oil, but the PCV system could benefit from it. my feeling is it is not worth the $180.
This thing is a big deal up here because the guy that came up with it is from MT. Anyway there is alot of mixed emotions on it around here most people don't believe it then some do but just don't want to shell out that cash to get one and I have never met anyone that has one to take a look at it if that tells you anything.