Replaces clause 1, note 4, with "The precision statement of this test method has not been determined with oxygenated fuels. This method may or may not apply to automotive gasolines containing lead anti-knock mixtures.", adds "ISO 3170:1988, Petroleum liquids - Manual sampling." in clause 2, replaces "... given in ISO 3171" with "... given in ISO 3170 or ISO 3171" in clause 7.