TEC - adding some gasoline to diesel is a time honored method to clean out the engine. all that black smoke you were belching out was the carbon accumulation in your engine. it's rough on the engine and don't do it too often, but it does work
robwkamm- triptane is indeed 2,2,3,-trimethylbutane, a total of 7-carbon atoms so an isomer of heptane. it slows burning and reduces a fuels tendency to explode before the spark, thus triptane, like tetra ethyl lead is a anti-knock compound. any high compression engine requires high octane fuel to keep from knocking but high octane ratings to not equate to high energy content fuel. if your car is designed for 82 octane fuel it will not run better, faster, or more powerfully on 92 octane. on the other hand an engine designed for 92 octane will knock and will run poorly on 82 octane
hydrogen peroxide decomposes to produce oxygen gas thus the engine is receiving extra oxygen which will cause anything to burn faster releasing more energy per unit of time