The words, terms and phrases as used in this chapter shall have the following meanings, unless the context requires otherwise:
The vapor pressure during the remaining months of the year shall not exceed eleven and five-tenths (11.5) pounds per square inch at one hundred degrees (100°) Fahrenheit. The method of determination shall be ASTM D4953. Federal or state regulation restricting vapor pressure to lower levels shall preempt these standards during the applicable months.
The methods of octane determination shall be ASTM D2699 for the research octane number (R) and ASTM D2700 for the motor octane number (M), or ASTM D2885 for both the research octane number and the motor octane number. The (R + M)/2 octane antiknock index shall be the average of the research and motor octane numbers. All retail pumps or delivery devices shall be labeled with the appropriate (R + M)/2 octane antiknock index in accordance with the Federal Trade Commission Octane Posting and Certification Regulation 306. No commercial gasoline shall be colored mahogany.
Specifications: The fuel oils herein specified shall be hydrocarbon oils free from acids, grit and fibrous or other foreign material. Three (3) grades of such oils are specified and these shall conform to the detailed requirements in the current American Society for Testing and Materials Specifications for Diesel Fuel Oils (ASTM D975), except for the sulphur content of Grade 2-D. All tests shall be in accordance with the applicable American Society for Testing and Materials method as set forth in the current ASTM Designation D975. Diesel fuel requirements are listed below:
Grade 1-D | Grade 2-D | Grade 4-D | |
Flash point, degrees F. D93 | Min. 100 | Min. 125 | Min. 130 |
Water & sediment, % by volume, D1796 | Max. 0.05 | Max. 0.05 | Max. 0.5 |
Carbon residue on 10% residium, % D524 | Max. 0.15 | Max. 0.35 | ________ |
Ash, % by weight, D482 Distillation, 90% point, degrees F., D86 | Max. 0.01 | Max. 0.01 | Max. 0.1 |
________ | Min. 540 | ________ | |
Max. 550 | Max. 640 | ________ | |
Viscosity @ 100 degrees F. kinematic-centistokes D445 | Min. 1.3 | Min. 2.0 | Min. 5.5 |
or | Max. 2.4 | Max. 4.1 | Max. 24.0 |
Viscosity @ 100 degrees F. Saybolt Universal Sec. | ________ | Min. 32.6 | Min. 45 |
Max. 34.4 | Max. 40.1 | Max. 125 | |
Sulphur, % by weight, D129 | Max. 0.5 | Max. 1.0 | Max. 2.0 |
Copper strip corrosion, D130 | Max. No. 3 | Max. No. 3 | ________ |
Cetane number, D613 or D976 | Min. 40 | Min. 40 | Min. 30 |
Miss. Code § 75-55-5