DIESEL EXHAUST FLUID

As noted at the beginning of this eBook, the EPA sets and monitors diesel fuel standards and regulations regarding the use of DEF. There are standards for highway and offroad diesel fuel vehicles, as well as locomotive and marine diesel fuel vehicles. Since 2001, there are have been several diesel fuel related statutes. The most recent is the Tier 3 Vehicle Emission and Fuel Standards Program 2015 Amendments Direct Final Rule , published on February 19, 2015, which set new diesel fuel restrictions of which you should be aware. Tier 3 Vehicle Emission and Fuel Standards Program “is part of a comprehensive approach to reducing the impacts of motor vehicles on air quality and public health. …The vehicle standards will reduce both tailpipe and evaporative emissions from passenger cars, light-duty trucks, medium-duty passenger vehicles, and some heavy-duty vehicles.” In addition, the EPA set standards for diesel fluid systems . These final rules regarding SCR maintenance were published on August 8, 2014, and state that minimum fluid refill intervals are: • 4,000 miles for all light-duty vehicles and trucks that use an SCR system • at least as far as the vehicle’s fuel capacity lasts, be that in miles or hours, for heavy-duty engines. If you ever are curious or concerned with EPA standards and regulations you are required to follow, visit the EPA website or contact them. The Definitive Guide to DEF EPA Regulations 8