The use of powders with attractive wear and friction has increased attention in industrial sectors and research. In this study. the experimental work results of the tribological behavior of base oil SN500 with CuO and ZrO2 as anti-wear and anti-friction hybrid additives powders at concentrations (0. 5. https://www.pomyslnaszycie.com/up-in-smoke-thorax-fr-fleece-welding-hoodie-black-black-for-sale/