A method for producing jet-range hydrocarbons includes passing a stream comprising renewable C4 olefins to an oligomerization reactor containing a zeolite catalyst to produce an oligomerized effluent, separating the oligomerized effluent to produce a jet range hydrocarbon stream and a recycle stream comprising C 8 olefins, and passing at least a portion of the recycle stream to the oligomerization reactor. A first at least 10 % of the jet-range hydrocarbon stream hydrocarbons boil between n-octane and n-undecane and wherein a second at least 10 % of the jet-range hydrocarbon stream hydrocarbons boil between n-dodecane and n-pentadecane.