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The Use of Red-Dyed Diesel Fuel With Diesel-Fueled Generators

4/11/2014
The Use of Red-Dyed Diesel Fuel With Diesel-Fueled Generators

There have been many questions concerning the use of red-dyed diesel fuel in Generac emergency standby generators. Generac now has technical information regarding red-dyed diesel fuel that applies to Generac diesel-fueled generators, including Protector Series. As part of the complete value proposition for diesel-fueled generators, red-dyed fuel offers potential operating cost savings for applications qualified under applicable laws to use fuel of this type.

The following information is provided for guidance on acceptable diesel fuels to be utilized:

Since June 1, 2012, all on-highway and non-road diesel fuel (except locomotive, marine and home heating oil) is required to have a sulfur content that does not exceed 15 ppm.

For stationary emergency engines to comply with EPA emission standards, the sulfur content of the fuel must not exceed 15 ppm.

Diesel fuel with a sulfur content less than 15 ppm is classified as Ultra Low Sulfur Diesel fuel (ULSD).

Dyed Fuel –Both the EPA and the IRS require a red dye to be added to certain classes of diesel fuel:

  • EPA requirement – The original EPA intent was to use a red dye to identify diesel fuel with a high-sulfur content, to ensure it is not used in on-road vehicles.
  • IRS Requirement – The IRS requires tax-exempt diesel fuel to be dyed red to ensure it is not used for taxable purposes.
  • By October 1, 2014, the EPA will require red-dyed, tax-exempt diesel fuel for non-road use to have a sulfur content of less than 15 ppm.
  • Red-dyed diesel fuel with sulfur content less than 15 ppm is already available today in the U.S. marketplace.

Home heating oil is not currently subject to the 15 ppm sulfur limitation. Home heating oil is any #1, #2, or non-petroleum diesel blend (biodiesel) that meets the following criteria:

  • Is sold for use in furnaces, boilers, and similar applications and which is commonly or commercially known or sold as heating oil, fuel oil, and similar trade names.
  • Is not jet fuel, kerosene, or Motor Vehicle, Non-road, Locomotive, and Marine Diesel Fuel (MVNRLM).

The standby generator owner/operator is solely responsible for identifying the sulfur content of the diesel fuel used in their generator, ensuring the fuel purchased does not exceed the 15 ppm sulfur limitation. Fuel properties can be determined from the fuel supplier or via laboratory testing.

Please contact Generac product manager, Mike Sparr michael.sparr@generac.com (or) 262-544-4811, Ext.2317) for additional information.

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