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Retrofit Technologies - Cetane Enhancers

Cetane enhancers are compounds added to diesel fuel oil to raise the fuel's measured cetane level. The addition of cetane enhancers to diesel fuel is one recognized retrofit technology used to reduce diesel engine emissions. Emission reduction information is provided below.

Emissions Reduction Performance Information for Cetane Enhancers
Technology Engine
Model/Application
Reductions (%)
PM CO NOx HC
Cetane Enhancers Highway, heavy duty, 4 cycle, non-EGR-equipped n/a n/a 0 - 5 n/a

Notes:

This page is maintained by EPA's Office of Transportation and Air Quality (OTAQ).
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