ultralow sulfur diesel what you need to know
The Illinois Petroleum Marketers Association/Illinois Association of Convenience Stores (IPMA) addresses common misconceptions about ultra-low sulfur diesel. Oct. 15 was a significant milestone in the nation’s transition to Ultra-Low Sulfur Diesel (ULSD) 15-ppm sulfur fuel. Prior to Oct. 15, petroleum terminals were permitted to downgrade (to 500-ppm sulfur LSD) as much ULSD as they wanted. [...]