The Hot Shot's Secret Everyday Diesel Treatment (EDT) with LX4 Lubricity Extreme from Lubrication Specialties is designed to prevent wear and scarring. LX4 Lubricity Extreme, also sold separately as a stand-alone product by Hot Shot’s Secret, has been tested and proven to improve diesel fuel lubricity by up to 56 percent, according to the company. EDT with LX4 Lubricity Extreme protects fuel system components such as fuel pump and injectors. It does not contains alcohol and its recommended use is one ounce per 25 gallons of diesel fuel.