Racing Fule mixture

4 gallons of petrol
1 gallon of xyolene
1/2 coup of marvolous oil

give it a good mix for about 4 min and you have over 100 octane fule
it is good for racing (my friend's teacher races on this)
or when added to normal fule it is great for cleaning engines

But how much over 100 octane is it. We run a 116 Octane fuel that is oxygenated and specifically designed for nitrous engines. Any less octane and it would hammer every piston in the motor and eat plugs every run.

if you start with 87 it comes to 101 - 102 octanes
so about 15 more that the starting fule