High gasoline consumption in Iran requires serious measures to control the use of this product. Undoubtedly one of the most important measures can be improving the efficiency of gasoline. Improved fuel efficiency coupled with a concern called the rebound effect where the initial reduction in fuel consumption is offset in resulting improved performance. Naturally, the lack of attention to the effect of gasoline will cause inefficiency policy optimization. This article aims to examine the factors influencing the effect of the measure and thus improve the efficiency of 5% in gasoline consumption in various sectors of the economy. For this target, computable general equilibrium model is used. General equilibrium model using a Social Accounting Matrix 1385 and assuming a small open economy is simulated. The results show that resulting in a 5 percent improvement in fuel efficiency, there is rebound effects in different sectors of the economy so that transport sector has the greatest rebound effect and oil and gas sector has minimal rebound effects. The total amount of rebound effect is equal 11.9 per cent. The results of the sensitivity analysis shows that with changes in the elasticity of substitution between gasoline and other energy products there is no slight change in the rebound effects.