Toluene, check my math here
#16
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100 unleaded was $7.25 at Mid Ohio and $7.50/ gallon at Watkins Glen in the past two weeks. Gets expensive at about 6-7 mpg....
#20
Burning Brakes
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Location: Lethbridge, Alberta, Canada
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Any paint distributor will sell you a drum of toluene. I bought a drum (45 Imp Gals or 55 US Gallons) for 341.00 Canadian which works out to 6.20 / US gal. We pay more for everything up here. Bummer. Anyway, I mix 4 Gals 91 Oct and 1 Gal 114 Octane and get 4 x 91+1 x 114 / 5 and get 95.6 octane which I run in both my street car (88 Turbo S) and my race car (83 944 w/ John Milledge built 968 Engine). I have had zero problems at these ratios.