AbstractElectronic waste (E-waste)plastic has been found to be a critical danger to the biological system. Electronic waste plastic has been appeared to ascend because of populace development, requiring fruitful decrease. The point of this examination is to think about the proficiency and discharge attributes of an electronic waste plastic oil (EWPO) filled diesel engine with aluminum oxide and manganese oxide nanofluids to diesel fuel. The pyrolysis interaction was utilized to make E-waste plastic oil at maximum yield of 80%, which has brilliant fuel properties. A single cylinder, four-stroke, constant speed, diesel engine was used in the experiments. The sol-gel technique was utilized to make aluminum oxide, and the co-precipitation strategy to make manganese dioxide nanofluids. FTIR and SEM techniques are used to portray the nanoparticles. Nanoparticles are dissolved and mixed with toluene and diesel with 20% EWPO in ultrasonicator with tween 20 as surfactant. The expansion of nanoparticles improved the fuel properties by expanding its surface region to volume proportion. The expansion of nanofluids to aEWPO 2.5% improves thermal efficiency (BTE) and brings down around 0.30 kg/kWh amount of specific fuel consumption (BSFC). The consequences of the investigations show that the expansion of nanofluids reduced carbon monoxide (1%), hydrocarbon (1–2%), and expanded NOx (939 ppm) outflows compared with EWPO20.