A process is described by which an olefinic naphtha and a hydrogenated
distillate fuel are made from a Fischer-Tropsch process. The olefinic
naphtha is suitable for use in an ethylene cracker where the olefins
enhance the formation of ethylene. Thy hydrogenated distillate fuel is
used in jet and or diesel fuels. Optionally the olefinic naphtha has a
low content of acids. This low acid content, is obtained by operating the
Fischer-Tropsch unit at H.sub.2/CO ratios from 1.8 to 2.05 or treating
the effluent from the Fischer-Tropsch unit with a metal oxide to remove
the acids.