MM>I don't think so.  Most car timing is now completely automated, and is set b
MM>the computer to two degrees below the 'knock point', where ever that happens
MM>be.  A higher octane will then raise the 'knock point', and thus the timing
MM>will run more advanced.

 GET real. That woudl ONLY be if the Compression or timing has changes
 Required More Octane then the Engine was Designed for.
Adn for your Information the Timing is set by the location of various
sensors on the engine as calcualted by the Engine Control Computer.
Timing retard form the Knock Sensor dosne't come into play unless soem
VERY unusual event offors. Like sensor Failure or extraordionary engine
loading. During Normal Driving the Knock sensor will make NO chanmges
to engine timing..
---
 þ SLMR 2.1a þ This note from El Cajon California USA