I've got a 55 gallon drum of 99.97% pure nitro sitting in the driveway. If I pour some in a cup and put a match in it, there is a wooff and then a pretty blue flame.
Adding it to gasoline would be the same thing as running very high octane fuel, which involves motor knowledge and reworking to run safely.
Also, none of the above is correct. Octane is a rating of resistance to detonation. You can easily and safely run 110 octane racing gas in your daily street car with no modification.
Pure nitromethane is an insensitive explosive.
I'm not sure what you are saying but I'm pretty sure it also is incorrect. If mixed with an alkali or contained and compressed it could become an explosive. Used as a fuel in it's pure state, it is NOT explosive.
Bill Vail