big nuts
"The common mix ratio is 70% gasoline to 30% Xylene, which equates to about
5 gallons of Xylene and the rest gas to fill your tank (assuming you'll be
filling a Supra). This should put you right at about 97-98 octane (for your gas).
Here in GA we use 91 octane so I'd be right at about 100-101 octane with this mix.
Also, you'll want to add about 5oz. of Marvels Mystery Oil, or Light Turbine
Engine Oil, to every gallon of Xylene you use. This replaces some of
the lubrication that would be lost using Xylene."
this is what someone told me