a general name for petroleum and the various oils distilled from it, oil consisting of a mixture of hydrocarbons either naturally occurring or obtained by the treatment of materials of natural origin, a fluid composed of petroleum hydrocarbons which may contain other constituents, naftaõli, suure molekulaarmassi ja kõrge keemistemperatuuriga (300-600 °C) süsivesinike segu; saadakse hrl. naftat destilleerides ja seejärel rafineerides