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Verified Retrofit Technologies - Biodiesel
Biodiesel: Diesel fuel oil modified with 0 to 100% biologically derived oils. The use of biodiesel fuel is one recognized retrofit technology used to reduce diesel engine emissions. Emission reduction information is provided below.
To read files on this page, you might need: MS Excel reader for spreadsheet files 
| Technology | Engine Model/Application | Reductions (%) | |||
|---|---|---|---|---|---|
| PM | CO | NOx | HC | ||
| Biodiesel | Highway, heavy duty, 2 & 4 cycle | 0 to 47 | 0 to 47 | 0 to -10 | 0 to 67 |
Notes:
- Reductions for all pollutants must be calculated for a particular biodiesel fuel. Download this biodiesel reduction spreadsheet (Excel, 39K) calculation file to use to determine reductions.
- A negative value in the table above indicates an increase in that pollutant.
- There are no data on biodiesel effects on engine durability, materials compatibility, fuel storage stability, lubricity, biodiesel production feedstocks or costs, cold flow properties, cost, renewability/full fuel lifecycle emissions.
- There is a slight fuel economy penalty with biodiesel use. An approximate fuel penalty calculation can be made with calculation worksheets above.
- Biodiesel fuel is composed of mono-alkyl esters of long chain fatty acids derived from vegetable oils or animal fats meeting the requirements of American Society of Testing and Materials (ASTM) D 6751.
- A biodiesel blend is a mix of biodiesel fuel meeting ASTM D 6751 with petroleum-based diesel fuel, and designated BXX, where XX represents the volume percentage of biodiesel fuel in the mix.
- EPA does not endorse the use of any particular company's product.