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Gasolines and alcohol blended gasolines are sampled from each region of the United States and analyzed using industry standard test methods. Typical gasoline properties reported are listed below. The surveys contain compilations of the physical and chemical properties of fuels marketed throughout the United States. The reports list trends of typical fuels and their selected properties over the last 15 years, and contain summary tables comparing current and previous year’s average, minimum and maximum values. The survey map shows the geographic boundaries of the regions sampled. Fuel supplier names have been removed to enable publication of these data.
| Gravity | Saturates | Olefins |
| Aromatics | Benzene | Sulfur |
| Solvent Washed Gum | Octane Numbers | Vapor Pressure |
| Distillation | Ethers | Alcohols |
| Year: 2005 | |||
|---|---|---|---|
| Number of Fuels: 173 | |||
| Unleaded Octane < 88 |
|||
| Test | Minimum | Average | Maximum |
| Gravity, °API | 55.0 | 62.9 | 67.5 |
| Sulfur content, ppm | 0 | 29 | 263 |
| Gum, mg/100 mL | 0 | 0 | 1 |
| Saturates, vol% | 45.0 | 62.9 | 77.7 |
| Olefins, vol% | 1.9 | 11.8 | 24.5 |
| Aromatics, vol% | 14.7 | 25.2 | 37.7 |
| Benzene, vol% | 0.37 | 1.16 | 3.09 |
| Octane number, Research | 88.6 | 91.5 | 95.4 |
| Octane number, Motor | 80.4 | 82.7 | 85.1 |
| Antiknock index (R+M)/2 | 84.7 | 87.1 | 90.1 |
| Vapor pressure, 100° F, psi | 10.9 | 13.1 | 15.0 |
| Vapor-liquid ratio of 20, °F | 108 | 118 | 129 |
| Distillation Temperature, °F | |||
| IBP | 79 | ||
| 5% Evaporated | 93 | ||
| 10% Evaporated | 104 | ||
| 20% Evaporated | 122 | ||
| 30% Evaporated | 143 | ||
| 50% Evaporated | 193 | ||
| 70% Evaporated | 250 | ||
| 90% Evaporated | 325 | ||
| 95% Evaporated | 358 | ||
| End Point | 403 | ||
| Residue, vol% | 0.9 | ||
| Loss, vol% | 1.9 | ||
| Ethers, vol% | |||
| MTBE | 0.0 | 0.1 | 2.6 |
| TAME | 0.0 | 0.0 | 3.3 |
| ETBE | 0.0 | 0.0 | 0.1 |
| DIPE | 0.0 | 0.0 | 0.0 |
The chemical and physical properties reported in this survey closely reflect the average quality of gasolines produced in each geographical area by United States refiners. The geographical marketing areas are shown on this map for motor gasoline Petroleum Products Surveys
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