A method is disclosed for producing a synthetic fuel, especially diesel
fuel and in addition gasoline, liquefied petroleum gas and heating gas
from a gas mixture comprising an oxygenate wherein the oxygenate is
methanol and/or dimethyl ether and/or another oxygenate, through a series
of steps, including olefin-formation, oligomerization of the olefins, and
several separation steps and recycling steps, in particular the recycling
of a stream of saturated hydrocarbons following the oligomerization of
olefins back to the olefin-forming stage, to obtain the diesel fuel and
the other synthetic fuels in high yield.