WHAT IS ULTRA LOW SULFUR DIESEL FUEL (ULSD)?
Ultra-low-sulfur diesel (ULSD) is cleaner diesel fuel because it has substantially lower sulfur content. Ultra-low sulfur diesel fuel has been refined so that its sulfur content is 15 parts per million (ppm) or less. This is 97 percent cleaner than the standard highway-use diesel fuel sold in the US, which contains an average of 500 ppm of sulfur. Sulfur, a natural part of the crude oil from which diesel fuel is derived, is one of the key causes of particulates or soot in diesel. Soot is the main culprit of diesel engines’ noxious black exhaust fumes and is among the prime contributors to air pollution. The move toward ULSD is aimed at lowering diesel engines’ harmful exhaust emissions and improving air quality.
WHY ULTRA LOW SULFUR DIESEL FUEL (ULSD)?
The greatest benefit of ultra-low sulfur diesel is that it burns cleaner than the previous generation of diesel fuel. This not only reduces pollution, but means less wear on certain replaceable components, particularly on engines designed specifically for the fuel. Ultra-low sulfur diesel works with the emission control devices found on numerous vehicles to further reduce harmful exhaust.
According to the U.S. EPA, the combined impact of moving to ultra-low sulfur diesel leads to significant improvements in human health, carbon emissions and environmental justice.
- ULSD is diesel fuel with a maximum sulfur content of 15 ppm (parts per million) and is often referred to as S 15. S 15, S500, and S5000 are designations for diesel fuels that meet 15 ppm, 500 ppm, and 5,000 ppm maximum sulfur content, respectively.
- ULSD will be required for all 2007 and later model year on-road diesel engines.
Even if you’re not legally required to use to ultra-low sulfur diesel fuel, there are both long- and short-term benefits to making the switch for your fleet.
- Safer and healthier workplace. Strong evidence suggests that using ultra-low sulfur diesel reduces long-term occupational health risks such as heart and lung disease, asthma, bronchitis and other chronic conditions.
- Longer lasting equipment with less maintenance. Using ULSD fuels will lenghten the lifespan of your equipment, require less repairs, and oil changes resulting in higher cost savings.
- Meeting future regulatory requirements. Your fleet will be better prepared to meet future EPA regulations.