Indonesia has multiple fuel grades for diesel and gasoline. As of January 2017, diesel with cetane number 48 is limited to 2,500 ppm sulfur nationwide; diesel with cetane number 51 has been limited to 500 ppm sulfur since 2006. The nationwide diesel sulfur limit tightens to 500 ppm in 2021 and 50 ppm in 2025. For gasoline, sulfur limits are set at 500 ppm.