Oil distribution is largescale multimodal systems and never considers sustainable of operation under levelized tariff while Thailand has a policy to reduce retail oil price differential gap which is unfavorable for upcountry residents. This study proposes sustainable evaluation for national energy strategy of oil distribution to the northern region of Thailand through pipeline expansion under levelized tariff. Strategic model is formulated on linear functions and used to explore value of evaluationfactors. AMPL with CPLEX is powerful solver for optimizing these programming problems. In the process of model validation, oil distribution characteristics of base system are compared with previous strategic study. After analysis, the results of levelized tariff systems show success of evaluation and express appropriated oil distribution system under levelized tariff which should be enacted to operate in this region.