in this work, the mixture flow rate of oil-water flows was studied using the turbine flow-meter. the research emphasis focuses on the effect of oil viscosity and input fluids flow rates on the precision of the meter. experiments were conducted to measure the in-situ mixture flow rate in a horizontal pipe with 0.05m diameter using seven different viscosities of white oil and tap water as liquid phases. results showed that both oil viscosity and input oil fraction exert a remarkable effect on measured results, especially when the viscosity of oil phase remained in the area of high value. in addition, for metering mixture flow rate using turbine flow-meter, the results are not sensitive to two-phase flow pattern according to the experimental data.