Toluene Mixing for higher octane has been done for years. What it boils down to is it is much cheaper than buying a tank full of 100 octane and safer than running race gas when you have catalytic converters. For firsthand experience w/toluene talk to JohnW whenever you see him on. Here's a FAQ I found when searching around the web.
http://www.elektro.com/~audi/audi/toluene.html
formula is
(A x O) + (B x 114) / (A + B) = C
A= # of gallons of pump gas
O= octane rating of pump gas
B= # of gallons of toluene
C= octane rating of yor mix
toluene has r+m/2 level of 114, much higher than any off the shelf octane boosters
So as an Ex. for all of the Subie Guys in California w/ your 15.5 gallon tank
(14 x 91) + (1.5 x 114) / 15.5 = C
(1274) + (171) / 15.5 = C
1445 /15.5 = C
C= 93.2
Toluene Mixing Quick Guide
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Toluene Mixing Quick Guide
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- Tarmac02
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