| a The values referred to in the specifications are “true values”. When establishing the value limits, the terms of ISO 4259 Petroleum products — Determination and application of precision data in relation to methods of test were applied. When fixing a minimum value, a minimum difference of 2R above zero was taken into account. When fixing a maximum and minimum value, the minimum difference used was 4R (R = reproducibility). Notwithstanding this procedure, which is necessary for technical reasons, fuel manufacturers shall aim for a zero value where the stipulated maximum value is 2R and for the mean value for quotations of maximum and minimum limits. Where it is necessary to clarify whether fuel meets the requirements of the specifications, the ISO 4259 terms shall be applied. | ||||
| b In cases of dispute, the procedures for resolving the dispute and interpretation of the results based on test method precision, described in EN ISO 4259 shall be used. | ||||
| c In cases of national dispute concerning sulphur content, either EN ISO 20846 or EN ISO 20884 shall be called up similar to the reference in the national annex of EN 228. | ||||
| d The actual sulphur content of the fuel used for the Type 6 test shall be reported. | ||||
| e The unleaded petrol content may be determined as 100 minus the sum of the percentage content of water and alcohols. | ||||
| f There shall be no intentional addition of compounds containing phosphorus, iron, manganese, or lead to this reference fuel. | ||||
| g Ethanol to meet specification of EN 15376 is the only oxygenate that shall be intentionally added to this reference fuel.’ | ||||
| ‘Parameter | Unit | Limitsa | Test methodb | |
|---|---|---|---|---|
| Minimum | Maximum | |||
| Research octane number, RON | 95 | — | EN ISO 5164 | |
| Motor octane number, MON | 85 | — | EN ISO 5163 | |
| Density at 15 °C | kg/m3 | report | EN ISO 12185 | |
| Vapour pressure | kPa | 50 | 60 | EN ISO 13016-1 (DVPE) |
| Sulphur contentc d | mg/kg | — | 10 | EN ISO 20846 EN ISO 20884 |
| Oxidation stability | minutes | 360 | — | EN ISO 7536 |
| Existent gum content (solvent washed) | mg/100ml | — | 4 | EN ISO 6246 |
| Appearance shall be determined at ambient temperature or 15 °C whichever is higher | Clear and bright, visibly free of suspended or precipitated contaminants | Visual inspection | ||
| Ethanol and higher alcoholsg | % (V/V) | 70 | 80 | EN 1601 EN 13132 EN 14517 |
| Higher alcohols (C3 – C8) | % (V/V) | — | 2 | |
| Methanol | — | 0,5 | ||
| Petrole | % (V/V) | Balance | EN 228 | |
| Phosphorus | mg/l | 0,3f | EN 15487 ASTM D 3231 | |
| Water content | % (V/V) | — | 0,3 | ASTM E 1064 EN 15489 |
| Inorganic chloride content | mg/l | — | 1 | ISO 6227 — EN 15492 |
| pHe | 6,5 | 9 | ASTM D 6423 EN 15490 | |
| Copper strip corrosion (3h at 50 °C) | Rating | Class 1 | EN ISO 2160 | |
| Acidity (as acetic acid CH3COOH) | % (m/m) | 0,005 | ASTM D1613 EN 15491 | |
| mg/l | 40 | |||
| Carbon/hydrogen ration | report | |||
| Carbon/oxygen ration | report | |||