Too much to post here, but check out this link....
http://www.refiningonline.com/Engelh...ep/TCR4_29.htm
Here's a calculator, but you'll have to "guessimate" the MON value...
http://www.csgnetwork.com/octaneratecalc.html
It's not simple because the RON/MON relationship is not linear and depends on the chemical. This is the best I can do on short notice.
