Working Together for Cleaner Air
International Retrofit Technologies
You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.
| Technology | Engine Model/Application |
Retrofit Fuel, Max Sulfur (ppm) | Reductions (%) † | |||
|---|---|---|---|---|---|---|
| PM | NOx | HC | CO | |||
| Green Diesel Technology - Low NOx Calibration plus Diesel Oxidation Catalyst with Ultra Low Sulfur Diesel (ULSD) | Highway Light Heavy-Duty, 4-cycle, Navistar/International engines, model years 1999 - 2003 in the following families: XNVXH0444ANA, YNVXH0444ANB, 1NVXH0444ANB, 2NVXH0444ANB, 3NVXH0444ANB |
15 | 10 | 25 | 50 | 10 |
† - Baseline assumes an unmodified engine running on regular 2D (<500 ppm sulfur) fuel.
| Technology | Engine Model/Application |
Retrofit Fuel, Max Sulfur (ppm) | Reductions (%) † | |||
|---|---|---|---|---|---|---|
| PM | NOx | HC | CO | |||
| Green Diesel Technology - Low NOx Calibration plus Diesel Oxidation Catalyst with Ultra Low Sulfur Diesel (ULSD) | Highway Light Heavy-Duty, 4-cycle, Navistar/International engines, model years 1999 - 2003 in the following families: XNVXH0444ANA, YNVXH0444ANB, 1NVXH0444ANB, 2NVXH0444ANB, 3NVXH0444ANB |
15 | 0 | 25 | 50 | 20 |
‡ - Baseline assumes an unmodified engine using ultra low sulfur (<15 ppm sulfur) fuel.
The following operating criteria must be met in order for appropriately retrofitted engines to achieve the above emissions reductions:
- The engine must be operated with a fuel that contains a sulfur content of no more than 15 ppm maximum sulfur content to achieve the reductions listed above.
- The engine should be well maintained and not consume lubricating oil at a rate greater than that specified by the engine manufacturer