REG Ultra Clean®
REG Ultra Clean® blends biodiesel and renewable diesel to create one of the lowest carbon intensity liquid fuels available. The patent-pending combination delivers both biodiesel’s excellent lubricity and renewable diesel’s high Cetane and low Cloud Point in a 100% renewable fuel. REG Ultra Clean reduces 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.
Features and Benefits
Feature | Benefit |
Reduced emissions | The best of both fuels’ emission profiles combine to significantly reduce total hydrocarbons (more than 20 percent), particulate matter (more than 40 percent), carbon monoxide (more than 25%) and NOx (by 10%) compared to petroleum diesel.* |
High performance | Higher Cetane for better performance, added lubricity for reduced engine wear, lower aromatics for improved public health and excellent Cloud Point for good cold-weather usage. |
Ease of use | Can be transported, stored and handled without any changes to a petroleum diesel delivery and storage infrastructure. |
Strong supply | With renewable diesel demand outpacing supply, blending in biodiesel can help stretch renewable diesel allocations while still offering an extensively renewable product. |
CARB Approved | Approved 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 ULSD.

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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