Biodiesel Cetane Rating

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Biodiesel cetane rating is used to rate combustion quality. The number is a measure of the delay of injection time. The higher the number, the shorter the ignition time.

• The higher the fuel’s cetane number, the smoother the engine will run, and the fewer emissions are released.

• Biodiesel’s oxygen content causes it to have a higher cetane number than petroleum diesel.

• Biodiesel must have a cetane number greater than 47 in order to pass ASTM standards.

• In comparison, ASTM certified petroleum diesel only needs a cetane number greater than 40.

In Summary:

The greater the cetane rating, the gentler on the engine it is than petroleum diesel!

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