Validity
This Executive Order approved the specified parts on on September 13, 2007.
As of Friday, January 17th, 2025 this Executive Order has not been overturned or superceeded.
This Executive Order approved the specified parts on on September 13, 2007.
As of Friday, January 17th, 2025 this Executive Order has not been overturned or superceeded.
Models | Modification | Remarks |
---|---|---|
1988-2006 model-year 4-stroke diesel engines with turbocharging and charge air cooling | This exemption excludes all engines originally equipped with an aftertreatment emission control system such as a catalytic converter or a diesel particulate filter. | This exemption is only valid provided the engines meet the following operating condition: the engine exhaust temperature exceeds 280 degrees Celsius for at least 25 percent of the typical duty cycle. The engines can be operated on California diesel (15 ppm sulfur), PuriNOx water emulsion fuel based on California diesel, or biodiesel blends containing no more than 20 percent biodiesel by volume. |