[Gregski]

Timing - Knock Learn Factor

Think of the Knock Learn Factor like a fuel gauge that goes from 1.0 to 0 (yes I did say it goes from 1 to 0 which is backwards, but hey GM did not reverse\fix that until Gen IVs)

So when the Learn Factor is at 1.0 we are using the High Octane table values ie aggressive timing.

When the Learn Factor is low ie 0 we are using the Low Octane table, mild timing, that's one way to remember it.

Now the PCM will skew the timing by some factor when the Learn factor falls between 1 and 0 but that's for it to figure out.