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Fuel Gresham, Hillsboro & Portland, OR - Marc Nelson Oil Products

Reduce Nitrogen Oxide Emissions - Gresham, Hillsboro & Portland, Oregon (OR)

At Marc Nelson Oil Products, we pride ourselves on making sure we meet the needs of our customers. We carry DEF at our Salem location and can answer any questions you have regarding DEF.

If you don't see a product listed below, contact us and we will get you the information you are looking for, or recommend a product we carry that will meet your needs.

We carry the DEFendal™ Deisel Exhaust Fluid brand and the TerraCair® Ultrapure Diesel Exhaust Fluid. For more information and a complete understanding of Diesel Exhaust Fluids, visit www.discoverdef.com. Below is some additional information reviewing the basics of DEF and answering some questions you may have.

Diesel Exhaust Fluid, commonly known as "DEF", is a specific composition for the application in transportation to reduce the amount of nitrogen oxides (NOx) emitted into the air by diesel engines.

DEF is a non-hazardous solution made up of 32.5% high purity automotive grade urea and 67.5% de-ionized water. Urea is a common agricultural fertilizer that is usually manufactured from natural gas.

DEF is inserted into the diesel vehicle's exhaust stream, breaking down NOx (nitrogen oxide) emissions into environmentally friendly nitrogen and water.

The system inserting the DEF into the exhaust stream is called "Selective Catalytic Reduction," or "SCR" and can be found on diesel vehicle model years 2010 and later, from commercial trucks to pickups and SUVs. DEF is not an additive to the fuel and doesn't come in contact with the diesel fuel. DEF is stored in a separate tank and fed into the exhaust system. It is not advised to attempt to mix this fluid manually, the mix process is very specific.


1977 Claxter Road NE, Salem, OR 97301 | 503.363.7676

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800.523.7676  •  503.363.7676  •  503.363.5822 (Fax)


Why Choose

Marc Nelson Oil Products?

We believe that the history, philosophy, product mix and success of Marc Nelson Oil Products should make your choice of petroleum distributors a simple one. Nowhere else will you find a match for our commitment to customer service, and from no other vendor will you find the mix of petroleum products, delivery methods and expertise that combine to make us the right choice, every time. Whether you're a large business running a fleet of a hundred vehicles, or a small shop with only one or two-if you use petroleum products to deliver services that meet your clients' needs, Marc Nelson Oil Products is the choice that will assure your success.