Toluene for octane

So you dont just dump the toulene straight into the gas,it must be mixed with the other ingredients?? and which is best bang for the buck,pros and cons??and how do you calculate octane using 87-89 pump gas with these?? and where else can you buy these chemicals besides wal mart and paint stores???can it be bought in bulk like 5 gals or more,or is there any limit or restrictions for the purchaser,I find this pretty interesting and would like to get more info and do some research...thanks
Relax ,RB . Straight up, as I read it.. My engine guy, did this in 73,and on. Let me, get you an answer.