The aim of research is _ preparation stable nanofluids on base oil and determination thermalconductivity, viscosity and investigation friction coefficient surfaces that contact _ together_ the objective ofthe present study is to measure the effective viscosities , thermal and mending effect for TiO2-oil CuO-oilCu-oil nanofluid at volume concentrations in the rang from 0.1 to 0.65 vol.% TiO2 , Cuo and Cunanoparticles.The effective viscosities of the TiO2-oil, CuO-oil and Cu-oil nanofluids were measured as afunction of particle volume concentration using an brokfild type viscometer. The effective thermalconductivities of the TiO2-oil, CuO-oil nanofluids were measured as a function of nanoparticle volumeconcentration using a transient hot wire (KD2) apparatus.A two-step method is used to produce TiO2-oilCuO-oil Cu-oil nanofluids with concentrations of TiO2 , CuO , Cu nanoparticles from 0.1 to 0.65 vol.%without any surfactant. Since ultrasonic vibration breaks down agglomerates in the mixture. Theeffectiveviscosities of TiO2-oil, CuO-oil and Cu-oil nanofluids with concentrations from 0.1 to 0.65 vol%weremeasured at the temperature of 22, C. The effective thermal conductivities of TiO2-oil andCuOoilnanofluids concentrations 0.1, 0.3, 0.5 vol.% and from 0.02 to 0.5 vol.% were measured at 25,C. showsresults the enhancement in the effective thermal conductivities of TiO2-oil and CuO-oil nanofluids as afunction of nanoparticle volume fraction. Also shows that the enhancement in the measured thermalconductivities of the TiO2-oil and CuO-oil nanofluids increases with increasing concentration.The presentresult shows that nanoparticles can be as dispersed particles in nanofluid if aggregation can beminimizedso amount maximum thermal conductivity. The pin-on-disk was used for measuring the tribologhproperties above mentioned nanofluids. The experimental results of pin-on-disk tests and observatioySEM have shown that the properties were improved by adding TiO2 , CuO and Cu nanoparticlesand alsothere exists a mending effect on the friction surface after being lubricated with oil containing Tio2 , CuOand Cu nano-particles. These testes performed for oil fluid and TiO2 nanofluid at differentconcentrationcontaning of 0.1,0.3,0.5vol% and CuO,Cu nanofluid at concentration 0.3vol%. The resultsshow that theoptimum concentration of TiO2 nanofluid is 0.3 vol% for having the minimum “rubbing” andalso thecopper nano-particles intensively decrease friction coefficient.