Aviation gasoline UL 91(unleaded) is a mixture of hydrocarbons prepared by the processing of crude oil. It contains anti-oxidant and anti-static additives.
Aviation gasoline UL 91 is used to power piston-engine aircraft.
Unleaded aviation gasoline UL 91 is produced according to ASTM D 7547.
Gasoline should be stored in containers that protect the fuel from air, moisture and mechanical impurities away from direct sunlight and heating (underground and above ground tanks with limited air exchange). These restrictions limit both the loss associated with evaporation and loss of the lightest elements, which may change the two key parameters of gasoline: vapour pressure and fractional composition. We work closely with our customers to ensure storage solutions are both suitable and safe.
| Colour | Colourless natural | |
| Knock Rating | ||
| Motor Octane Number, MON | – | Min 91 |
| Research Octane Number, RON | Min 96 | |
| Distillation | ||
| Initial boiling point | °C | Report |
| 10% vol. at | °C | Max 75 |
| 40% vol. at | °C | Min 75 |
| 50% vol. at | °C | Max 105 |
| 90% vol. at | °C | Max 135 |
| Final boiling point | °C | Max 170 |
| Productivity | %(v/v) | Min 97 |
| Residue | %(v/v) | Max 1,5 |
| Loss | %(v/v) | Max 1,5 |
| Sum of 10% + 50% evaporated | ||
| temperatures | °C | Min 135 |
| Total sulphur | % m/m | Max 0,05 |
| Density at 15 °C | kg/m3 | Report |
| Specific energy | MJ/kg | Min 43,5 |
| Freezing point | °C | Max (-58) |
| Copper strip corrosion | ||
| 2h at 100°C | corrosion level | Max 1 |
| Water reaction | ||
| Volume change | ml | |
| Electrical conductivity | ||
| at 20°C | pS/m | 50-450 |
| Reid vapour pressure at 37,8°C | kPa | 38-49 |
| Oxidation stability | ||
| 16 h at 100°C | ||
| potential gum content | mg/100ml | Max 6 |
