CFR

1065.710—Gasoline.

(a) Gasoline for testing must have octane values that represent commercially available fuels for the appropriate application.

(b) There are two grades of gasoline specified for use as a test fuel. If the standard-setting part requires testing with fuel appropriate for low temperatures, use the test fuel specified for low-temperature testing. Otherwise, use the test fuel specified for general testing. The two grades are specified in Table 1 of this section.

Table 1 of § 1065.710 —Test Fuel Specifications for Gasoline

Item	Units	General testing	Low-temperature testing	Referenceprocedure 1
Distillation Range:
Initial boiling point	°C	24-35 2	24-36
10% point	°C	49-57	37-48	ASTM D86-07a.
50% point	°C	93-110	82-101
90% point	°C	149-163	158-174
End point	°C	Maximum, 213	Maximum, 212
Hydrocarbon composition:
Olefins	m3/m3	Maximum, 0.10	Maximum, 0.175	ASTM D1319-03.
Aromatics		Maximum, 0.35	Maximum, 0.304
Saturates		Remainder	Remainder
Lead (organic)	g/liter	Maximum, 0.013	Maximum, 0.013	ASTMD3237-06e01.
Phosphorous	g/liter	Maximum, 0.0013	Maximum, 0.005	ASTM D3231-07.
Total sulfur	mg/kg	Maximum, 80	Maximum, 80	ASTM D2622-07.
Volatility (Reid Vapor Pressure)	kPa	60.0-63.4 2, 3	77.2-81.4	ASTM D5191-07.
1 ASTM procedures are incorporated by reference in § 1065.1010 . See § 1065.701(d) for other allowed procedures.
2 For testing at altitudes above 1,219 m, the specified volatility range is (52.0 to 55.2) kPa and the specified initial boiling point range is (23.9 to 40.6) °C.
3 For testing unrelated to evaporative emissions, the specified range is (55.2 to 63.4) kPa.

Code of Federal Regulations

[70 FR 40516, July 13, 2005, as amended at 73 FR 37341, June 30, 2008]

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