Do You Need DEF Fluid In Your Fuel Tank?

Is your diesel engine burning as cleanly as possible? You probably already have ultra-low sulfur diesel in your fuel tank in Rochester, MN, to comply with state and federal environmental regulations. Minnesota also requires any diesel fuel sold in the summer months to contain at least 20% biofuel to reduce emissions further.

In 2010, the federal EPA began to require heavy-duty vehicle engines to support Selective Catalytic Reduction, a new technology intended to reduce nitrous oxide emissions. These additional components mandated a new exhaust system to provide after-treatment of the exhaust emissions, using DEF fluid to "wash" the exhaust on its way out of the engine.

SCR is considered preferable to alternatives within the engine since it allows for a wider range of engine performance, tuning diesel engines to provide better mileage or torque rather than minimizing emissions at the source at the expense of efficiency.

What Is DEF Fluid?

DEF Fluid (diesel exhaust fluid) is a fuel additive required by most modern diesel engines, which is sprayed into the exhaust system. A colorless and slightly ammonia-scented solution of urea and distilled water, DEF flows into the exhaust where the urea catalyzes the nitrous oxide emissions and breaks them down into harmless nitrogen and oxygen gases. Along with unburnt fuel recirculation, DEF can reduce certain emissions by up to 90%.

Where Can You Get DEF?

Along with our full range of fuels and lubricating oils, Feils Oil Company supplies DEF fluid in Rochester, MN, and nearby areas for our diesel customers. For most diesel engines, you will need to top off your DEF tank less often than your fuel tank but slightly more often than you need to get your oil changed. A typical truck will use about a gallon of DEF for every 200 miles driven, and the cost of adding DEF fluid will be offset at least partially by the additional fuel efficiency gains.

Do you have questions about gas, oil, or diesel fuel tanks in Rochester, MN? Feils Oil Company is your dedicated fuel supplier, here to serve southeastern Minnesota. Call us at (507) 318-4348 for more information or to order your fuel delivery.