Petroleum Testing Services

No. 4-D | Diesel Fuel Oil Testing According to ASTM D975-21

ASTM D975-21, Standard Specification for Diesel Fuel Oils, defines and provides specifications for No. 4-D fuel oil.

No. 4-D is a heavy distillate fuel, or a blend of distillate and residual oil, used for low and medium speed diesel engine applications involving primarily constant speed and load.

Paragon is capable of performing a majority of the analysis related to the testing of No. 4-D fuel oil according to ASTM D975-21 Table 1 requirements.

Procedures included on our A2LA Scope of Accreditation to ISO/IEC 17025:2005 are designated as such.


ASTM D975-21 Table 1, Approved August 1, 2021

Service Method Reference Min. Sample Vol. Price ISO 17025
Flash Point ASTM D93 150 mL $62.00
Water and Sediment ASTM D1796 100 mL $78.00
Kinematic Viscosity, at 40 °C ASTM D445 20 mL $62.00
Ash ASTM D482 150 mL $78.00
Sulfur* [A] ASTM D2622 40 mL $104.00 ---
Cetane Number ASTM D613 1000 mL $332.00
Total Cost   1460 mL $716.00  


*Procedures we do not currently perform.

[A] ASTM D2622 is listed in ASTM D975-21 as the referee method for sulfur analysis on S5000 grades. ASTM D5453 can be used as an alternative test procedure. Section 5.1.8 of ASTM D975-21 states that ASTM D5453 is appropriate for all grades of diesel fuel oil. Paragon currently offers analysis by ASTM D5453.