Home About Us Services Safety Testimonials Testimonials Contact Us

DEF Purchase Options

  • Case (Includes 2-2.5 gallon containers)

  • 55 Gallon Drum

  • Bulk Tote (275 or 330 gallons)

 Options for Totes and Drums

  • Hand pump with hose and nozzle used for 55 gallon drums

  • Dolly for 55 gallon drum

  • 110v electric pump with hose, automatic nozzle and gauge.  Can be used with totes and drums.


Cases, drums, and totes can be delivered or picked up
 at our Belmont location.

Diesel Exhaust Fluid

Diesel Exhaust Fluid - DEF - is a urea-based chemical reactant designed specifically for use in SCR systems to reduce NOx emissions.

How DEF Works

Selective Catalytic Reduction (SCR) is an exhaust after treatment system that injects a small amount of a chemical called Diesel Exhaust Fluid (DEF) into the exhaust. DEF is mixed with exhaust in the presence of a catalyst turning NOx (oxides of nitrogen a harmful pollutant that contributes to smog and acid rain) into harmless nitrogen and water vapor.

Advantages of SCR

  • SCR provides better fuel economy

  • SCR meets 2010 Vehicle Emissions Standards for Diesel Engines

  • SCR improves engine lubricant and filter life

42 Brighton Street
Belmont, MA 02478

(617) 484-0888



Web Site Design & Maintenance - Webs Online, Etc.

Copyright 2015 Mahoney Oil. All rights reserved