Diesel Emission standards have reached their peak in North America with the demand for less sulfur content to improve air quality. Petroleum refineries are now producing Ultra Low Sulfur Diesel, or S15, which has a maximum sulfur content of 15 parts per million (ppm). ULSD is now totally phased in as a direct replacement for (LSD) Low sulfur diesel or S500 (Sulfur content 500 ppm). The ultimate goal is to reduce sulfur content by 95 percent.
School District. No. 73 serving Kamloops, British Columbia, located about 220 miles northeast of Vancouver, recently had a "no run" problem with a 1998 DT466E International diesel engine. This particular engine had racked up 381,000 km (about 236,742 miles), so it was just a matter of time when something like this was going to happen.