fwiw heres a pic of your high vs low octane tables
http://mysite.verizon.net/whenn1/highlowoctane.JPG ...the knock sensors just give the computer an idea of what to do...if it starts seeing more & more KR it realizes your using ****** gas & will interpolate more to the low octane table once you throw some good gas back in it will start to go back to normal as it realizes you've got the good stuff back in it.