REG Ultra Clean®

REG Ultra Clean® blends biodiesel and renewable diesel to create one of the lowest-carbon liquid fuels available. Our proprietary combination delivers biodiesel’s excellent lubricity and renewable diesel’s high Cetane and low Cloud Point in a 100% renewable fuel. REG Ultra Clean reduces carbon emissions enough to be an approved fuel by the California Air Resources Board (CARB), one of the most stringent clean air standards in the world.


REG Ultra Clean® Features and Benefits

Reduced emissions

The best of both fuels’ emission profiles combine to significantly reduce emissions compared with petroleum diesel:*

  • Particulate matter by more than 40%
  • Carbon monoxide by more than 25%
  • Total hydrocarbons by more than 20%
  • NOx by 10%
High performanceHigher Cetane for better performance, added lubricity for reduced engine wear, lower aromatics for improved public health and excellent Cloud Point for good cold-weather use.
Ease of useCan be transported, stored and handled without any changes to a petroleum diesel delivery and storage infrastructure.
Strong supplyWith renewable diesel demand outpacing supply, blending in biodiesel can help stretch renewable diesel allocations while still offering an extensively renewable product.   
CARB-approvedApproved for year-round use by the California Air Resources Board, which oversees the state's Low Carbon Fuel Standard (LCFS). 

*Data based on California Air Resources Board assessments compared to federal ultra-low sulfur diesel.

Truck Stop Attracts Business with REG Ultra Clean®

Hear how a truck stop operator uses REG Ultra Clean to drive profits and help customers meet California's stringent environmental regulations.

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Case Study

California Fuels & Lubricants has found success and reached new customers by offering REG Ultra Clean and other renewable fuels.

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The Sum of Two Biofuels is Greater Sustainability

Blending biodiesel with renewable diesel to create REG Ultra Clean gives users the best properties of each fuel. That makes a big difference with sustainability. Compared to petroleum diesel, REG Ultra Clean reduces total hydrocarbons by more than 20 percent, particulate matter emissions by more than 40 percent, carbon monoxide emissions by more than 25 percent and nitrogen oxide emissions by 10 percent.

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  • REG-9000 Biodiesel
  • REG-9000 Distilled Biodiesel
  • REG Renewable Diesel
  • REG Ultra Clean Diesel
  • REG Blended Fuel
  • REG Diesel Fuel
  • REG Ethanol Blends
  • REG Gasoline
  • REG Glycerin
  • REG Methyl Esters
  • REG Bio-Residual Oil
  • REG Renewable Autogas
  • REG Renewable Naphtha
  • REG Biodiesel B
  • REG Potassium Sulfate
  • REG Renewable Chemicals
  • REG Heating Oil
  • Bioheat Blended Fuel