You can mix nitromethane with gasoline, but there are some precautions that need to be observed since some very unstable compounds can form with nitromethane/gasoline mixes. The drag racing community has used these mixes in the past, but there have been some accidents with high (30%+ nitromethane in gasoline) concentrations. First, always pour the nitromethane into gasoline that is constantly agitated. If you pour gasoline into nitromethane, the interface contrentation is high enough to form the unstable compounds even though the final mixture is intended to be less than 30%.

Nitro can be safely mixed with methanol at any ratio, but with hydrocarbons, the potential for formation of unstable organo-nitro compounds is always a concern. These compounds are unstable and can decompose explosively with very little energy input.