CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER U—AIR POLLUTION CONTROLS (Parts 1027–1074) > PART 1065—ENGINE-TESTING PROCEDURES > SUBPART H—Engine Fluids, Test Fuels, Analytical Gases and Other Calibration Standards (§1065.701 to §1065.790) > 1065.710—Gasoline.

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]