Fuels, and fuel additives

There are hundreds of different fuel additives with all kinds of different claims! We are only really interested in the ones that CAN work to help power. First we need to understand the differences between the two common road fuels we all use, and a few "race" fuels. 1st we have all those "additives" that claim to improve power, and torque, improve "smoothness" emissions, and mileage!