86.307-82—Fuel specifications.

(a) Gasoline. (1) Gasoline having the following specifications will be used by the Administrator in exhaust emission testing. Gasoline having the following specifications or substantially equivalent specifications approved by the Administrator shall be used by the manufacturer in exhaust testing, except that the lead and octane specifications do not apply.

Item designation	ASTM	Leaded	Unleaded
Octane, research, minimum	D2699	100	96
PB (organic), grams/U.S. gallon		1 1.4	0.00-0.05
Distillation Range:
IBP, °F	D86	75-95	75-95
10 pct point, °F	D86	120-135	120-135
50 pct point, °F	D86	200-230	200-230
90 pct point, °F	D86	300-325	300-325
EP, °F (maximum)	D86	415	415
Sulfur, weight percent, maximum	D1266	0.10	0.10
Phosphorus, grams/U.S. gallon, maximum		0.01	0.005
RVP pounds per square inch	D323	8.0-9.2	8.0-9.2
Hydrocarbon composition:
Code of Federal Regulations 631
Olefins, percent, maximum	D1319	10	10
Aromatics, percent maximum	D1319	35	35
Saturates	D1319	(2)	(2)
1 Minimum. 2 Remainder.

(2) Gasoline representative of commercial gasoline which will be generally available through retail outlets shall be used in service accumulation. For leaded fuel the minimum lead content shall be equal to the average lead content found in regular leaded gasoline in the fuel survey prescribed by the Administrator. Where the Administrator determines that engines represented by a test engine will be operated using gasoline of different lead content from that prescribed in this paragraph, he may consent in writing to use of a gasoline with a different lead content. The octane rating of the gasoline used shall be no higher than 4.0 research octane numbers above the minimum recommended by the manufacturer and have a minimum sensitivity of 7.5 octane numbers for unleaded fuel and 7.0 octane numbers for leaded fuel, where sensitivity is defined as research octane number minus motor octane number.

(b) Diesel Fuel. (1) The diesel fuels employed for testing shall be clean and bright, with pour and cloud points adequate for operability. The diesel fuel may contain nonmetallic additives as follows: Cetane improver, metal deactivator, antioxident, dehazer, antirust pour depressant, dye, and dispersant.

(2) Diesel fuel meeting the following specifications, or substantially equivalent specifications approved by the Administrator, shall be used in exhaust emissions testing. The grade of diesel fuel recommended by the engine manufacturer commercially designated as “Type 1-D” or “Type 2-D”, shall be used.

Item	ASTM test method No.	Type 1-D	Type 2-D
Cetane Number	D613, D86	48-54	42-50
Distillation range:
IBP, °F		330-390	340-400
10 percent point, °F		370-430	400-460
50 percent point, °F		410-480	470-540
90 percent point, °F		460-520	550-610
EP, °F		500-560	580-660
Gravity, °AP1	D287	40-44	33-37
Total sulfur, percent	D129 or D2622	0.05-0.02	0.2-0.5
Hydrocarbon composition	D1319
Aromatics, percent (minimum		1 8	1 27
Paraffins, naphthenes, olefins		(2)	(2)
Flashpoint, °F (minimum)	D93	120	130
Viscosity, centistokes	D445	1.6-2.0	2.0-3.2
1 Minimum.
2 Remainder.

(3) Diesel fuel meeting the following specifications, or substantially equivalent specifications approved by the Administrator, shall be used in service accumulation. The grade of diesel fuel recommended by the engine manufacturer, commercially designated as “Type 1-D” or “Type 2-D”, shall be used.

Item	ASTM test method No.	Type 1-D	Type 2-D
Cetane (minimum)	D613	42-56	38-58
Distillation range 90 pct point, °F	D86	440-530	540-630
Gravity, °AP1	D287	39-45	30-42
Total sulfur, percent	D129 or D2622	0.05	0.2
Flashpoint, °F (minimum)	D96	120	130
Viscosity, centistokes	D445	1.2-2.2	1.5-4.5
1 Minimum.

(4) Other petroleum distillate fuels may be used for testing and service accumulation provided:

(i) They are commercially available;

(ii) Information, acceptable to the Administrator, is provided to show that only the designated fuel would be used in customer service;

(iii) Use of a fuel listed under paragraphs (b) (2) and (3) of this section would have a detrimental effect on emissions or durability; and

(iv) Written approval from the Administrator of the fuel specifications was provided prior to the start of testing.

(5) The specification range of the fuels to be used under paragraphs (b) (2), (3), and (4) of this section shall be reported in accordance with § 86.082-21(b)(3).

(c) Fuels not meeting the specifications set forth in this section may be used only with the advance approval of the Administrator.

Code of Federal Regulations

[46 FR 50494, Oct. 13, 1981, and 47 FR 49807, Nov. 2, 1982]

CFR

86.307-82—Fuel specifications.

Code of Federal Regulations