At Popular Transportation Inc, we know how important Diesel Exhaust Fluid (DEF) is for keeping your truck’s emissions system running efficiently and meeting environmental standards. Our DEF Service ensures that your vehicle has the right amount and quality of DEF to maintain peak performance and reduce harmful emissions.

Whether you’re on the road or at our service location, we provide quick and reliable DEF refills to keep your truck compliant with EPA regulations. Using high-quality DEF fluid, our technicians make sure your selective catalytic reduction (SCR) system operates smoothly — improving fuel efficiency and extending the life of your engine.