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Dyed diesel is special fuel, as defined in the Motor Fuel Tax Law, that contains a red solvent dye meeting specific requirements and is only sold and used for non-highway purposes.
Visit the Dyed Diesel General Information and Requirements page and the Dyed Diesel Fuel Enforcement Program page (PIO-71) for more information.
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You may access additional information by searching the entire Illinois Department of Revenue website.
If you have additional inquiries, you may submit them on the Questions, Comments, or Requests form.