Sadly they don't have it online, but I did read said article (made a special trip to just to read it). Personally it made little sense to me to bother. The same effect could be done with water injection. People are lazy and no way are they going to want to deal with 2 pumps, it's hard enough getting someone to top off their oil in an RX-8.
Water injection was tried by GM back in the 60's. It was the first production turbo gas car on the market. It ran a 10.25:1 compression 215 buick/rover v8 with a turbo (can't recall the boost pressure). From what I've been able to find, not a single original one survives to this day, they were all converted to the lower spec 4 barrel carb models because no one bothered to fill the water injection system. It had a safeguard that kept the turbo from building boost if there was no fluid in the system and people bitched of performance.
Seeing just some of the shit I've seen from backyard engineers and racers, I know there is a lot left on the table of a standard issue gas/petrol engine.