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National Clean Diesel Campaign (NCDC)

Working Together for Cleaner Air

International Retrofit Technologies

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Green Diesel Technology Low NOx Calibration plus DOC
Verification Letter (PDF)  (2 pp, 200K, June 2005)
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:

  1. 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.
  2. The engine should be well maintained and not consume lubricating oil at a rate greater than that specified by the engine manufacturer

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