The Hot Shot's Secret Everyday Diesel Treatment (EDT) from Lubrication Specialties is a daily diesel fuel additive treatment designed to improve engine power and performance for diesel and biodiesel fuel by increasing cetane and lubricity. According to the company, when used for preventative maintenance with every fill-up, EDT corrects multiple issues related to ultra low sulphur diesel and biodiesel fuel to prevent wear without altering fuel viscosity. EDT can be used as a stand-alone treatment, or as part of a two-step treatment plan with Hot Shot's Secret Diesel Extreme. The recommended use is one ounce per 25 gallons of diesel fuel.