Quote Originally Posted by techinspector1
I'm not sure about that stuff, never having used it. But I'm told that the manufacturers figure one point as actually 1/10th of a point, so if it says it raises the octane 5 points for instance, it will actually raise the octane from 93 to 93.5
I've heard that as well. I also have read of some tests that were conducted (I don't remember where now though...) that in some cases there were no noticeable differences after andding it, and in some cases adding the octane boost actually lowered the octane rating.