Government Regulations and Engine Technologies

Learn about recent emissions standards and how to comply with government regulations.

Information You Need To Stay Compliant

Penske Used Trucks offers tractors, trailers and trucks with a variety of engine technologies. We have equipment that is compliant with the Environmental Protection Agency's (EPA) requirements.

Understanding EPA Emissions Standards

The trucking industry is changing at a very fast pace, and with the increasing demands to stay compliant, we want to make sure you have all the current information you need. Here are some of the most recent emissions standards. Please consult your own experts to determine requirements applicable to your vehicles.

Truck and Bus Regulation Compliance

The California Air Resource Board (CARB) approved the truck and bus regulation to significantly reduce particulate matter (PM) and oxides of nitrogen emissions from existing diesel vehicles operating in California. Learn more.

Engine Technology

Starting in 2010, the EPA required that diesel truck emissions contain a drastically reduced percentage of NOx (oxides of nitrogen). NOx is an environmental pollutant that contributes to smog and acid rain. Two NOx reduction technologies have emerged. Selective Catalytic Reduction (SCR) and Exhaust Gas Recirculation (EGR).

Diesel Exhaust Fluid

Diesel Exhaust Fluid (DEF) is an emissions control liquid required by modern diesel engines. It is injected into the exhaust stream. It is a non-hazardous solution of 32.5 percent urea in 67.5 percent de-ionized water. DEF is clear and colorless, and looks exactly like water. It has a slight smell of ammonia, similar to some home cleaning agents. DEF is used in (SCR) technology to remove harmful NOx emissions from diesel engines.

Compliance Information for Trailers

CARB approved the tractor-trailer greenhouse gas regulation to significantly reduce the greenhouse gas emissions produced by certain heavy-duty tractor-trailers. The regulation requires the use of the U.S. EPA SmartWay verified aerodynamic technologies and low rolling resistance (LRR) tires on vehicles operating on California highways. The regulation also provides exemptions and delayed compliance deadlines for certain refrigerated trailers, along with phase-in options and credit for early compliance. Learn more.

Low Rolling Resistance Tires

Low rolling resistance (LRR) tires are designed to improve the fuel efficiency of tractor-trailers by minimizing their rolling resistance. As tires roll under the vehicle's weight, they deflect and dissipate energy into heat. Requiring SmartWay verified tires on tractors and trailers should reduce greenhouse gas emissions by reducing fuel consumption by at least three percent from both the tractor and trailer. Learn more.

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