- No. 1 fuel oil and No. 1 diesel oil are light petroleum distillates that differ in distillation temperature and American Society for Testing and Material (ASTM) specifications. No. 1 diesel fuel has distillation temperatures of 550 degrees Fahrenheit at the 90 percent point. While No. 1 fuel oil has the same distillation temperature, it also has a 10 percent recovery point of 400 degrees Fahrenheit.
No. 1 diesel fuel meets the requirements outlined in ASTM Specification D 975 and No. 1 fuel oil is defined by ASTM Specification D 396. No. 1 diesel fuel is used in high-speed diesel engines and No. 1 fuel oil is used primarily as fuel for portable outdoor stoves and portable outdoor heaters. - No. 2 fuel oil and No. 2 diesel oil are also petroleum distillates that differ in distillation temperature but meet the same ASTM specifications as No. 1 distillates. No. 2 distillates have distillation temperatures of 640 degrees Fahrenheit at the 90 percent point; however, No. 2 fuel oil and No. 2 diesel fuel have distillation temperatures of 400 degrees Fahrenheit and 500 degrees at the 10 percent recovery point, respectively. No. 2 fuel oil is used in commercial and industrial burner units and atomizing-type burners for home heating.
- No. 4 fuel is made by blending distillate fuel oil and residual fuel oil. It meets the requirements of federal specification W-F-815C or ASTM specification D 396 and is used in industrial and commercial burners. No. 4 diesel fuel meets ASTM specification D 975 and is used for low- to medium-speed diesel engines.
previous post