The gas oil feedstock was solvent extracted with pyrrolidone (NMP) at different temperatures (50 degrees C-70 degrees C) and at different solvent feed ratios (ranging from 2/ 1 to 5/ 1.) The raffinates were treated with four flow improvers additives; two synthesized improvers (poly NAFOL 1822C palmitate-Co-N, N ditallowamine phthalic diamide and poly NAFOL 1822C palmitate Co-N, N ethanolamine phthalic diamide) and two available commercial improvers 2437 (Com. 1) & commercial wax dispersant CWD-11 (Com. 2) to study their efficiencies and suitabilities for improving the rheological properties. The efficiency of the additives in reducing the pour point of gas oil and their raffinates is in the order: Sec > Et > Com1 > Com2.