Toluene = > octane?

[JAMES_S_WALLACE@HP-Canada-om1.om.hp.com]

     A while back someone mentioned that laquer thinner, which is toluene, 
     could be used to boost octane. So two questions:
     
     1. Did I get this right - was it toluene?
     
     2. What proportions are used to raise the octane by how much? Please, 
     if just a bit of toluene is used, specify whether your directions are 
     for American or Imperial gallons.
     
     Thanks,
     Jim Wallace