ULP 91

Research octane number (RON)

Regular grade fuel: 91.0 minimum

ASTM D2699

Motor octane number (MON)

Regular grade fuel: 81.0 minimum

ASTM D2700

Colour

Not to be mistaken for water

Visual

Percentage volume evaporated at 70°C (E70)

22 minimum

48 maximum

ASTM D86

Percentage volume evaporated at 100°C (E100)

45 minimum
70 maximum

ASTM D86

Percentage volume evaporated at 150°C (E150)

75 minimum

ASTM D86

End point (°C)

210 maximum

ASTM D86

Residue (% volume)

2 maximum

ASTM D86

Flexible volatility index [DVPE (kPa) + (0.7 × E70)]

115.0 maximum

ASTM D86 and ASTM D5191

Vapour Pressure (DVPE) (kPa)

South Island: 75 kPa summer, 85 kPa autumn and spring, 95 kPa winter

ASTM D5191

Minimum: 45 kPa all year

Copper strip corrosion (3 hours at 50°C)

Class 1 maximum

ASTM D130

Sulphur (mg/kg)

10 maximum

IP 497 or ASTM D5453

Existent gum (solvent washed) (mg/100 mℓ)

5 maximum

ASTM D381

Oxidation stability induction period (minutes)

360 minimum

ASTM D525

Lead (mg/ℓ)

5 maximum

IP 224 or ASTM D5059

Benzene (% volume)

1 maximum

ASTM D5580

Total aromatic compounds (including benzene) (% volume)

42 maximum pool average and 45 maximum cap

ASTM D5580

Ethanol (% volume)

10 maximum

ASTM D4815

Olefins (% volume)

18 maximum

ASTM D1319 or ASTM D6839

Manganese (mg/ℓ)

2.0 maximum

ASTM D3831 or BS EN 16136

Phosphorus (mg/ℓ)

1.3 maximum

ASTM D3231

Total oxygen (% mass)

Petrol blended with not more than 5% volume ethanol: 2.7 maximum

ASTM D4815

Petrol blended with more than 5% and not more than 10% volume ethanol: 3.7 maximum

ASTM D4815

Methyl tertiary butyl ether (% volume)

1 maximum

ASTM D4815

Methanol (% volume)

3 maximum

ASTM D4815