Fuel Oil Vs. Diesel Fuel
Fuel oil and diesel fuel are categorized as distillate fuels but are used for different purposes. While fuel oil is used primarily for stationary energy sources, diesel fuel is for automobiles.
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No. 1 Distillates
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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 Distillates
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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.
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No. 4 Fuel
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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.
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