Guest Post Author Jeffrey Harmening, Manager-EOLCS/DEF/MOM, American Petroleum Institute As restrictions are being lifted across most states in the country and with warm weather upon us, it is important for truck drivers to consider proper management of Diesel Exhaust Fluid (DEF) used in most diesel-powered trucks. DEF is made from a mixture of technically pure … Continue reading Keep your truck running smoothly by using high-quality diesel exhaust fluid