_Please don't read more into my comments on octane than are there. What I said was, "you can run the lowest octane you can find that doesn't detonate." you can certainly try the 89 octane, but if you experience knock or ping (detonation) you'll need to return to high-test. As for your buddy's Turbo Blue, all gasoline has the same approximate caloric value-19,000 BTUs per liter-meaning the 110 won't run any hotter than 89 octane, so his theory doesn't hold water. Ironically, though, if you run low-octane fuel that causes detonation, the pistons will have a nice, clean, freshly scoured look to them, especially around the hole that burns through the center.