NOx emission is one of the major sources for health issues, acid rain and global warming. Diesel engine vehicles are the major sources for NOx emissions. Hence there is a need to reduce the emissions from the engines by identifying suitable techniques or by means of alternate fuels. The present investigation deals with the effect of Exhaust Gas Recirculation (EGR) on 4S, single cylinder, DI diesel engine using plastic oil/Diesel blends P10 (10% plastic oil & 90% diesel in volume), P20 and P30 at various EGR rates. Plastic oil blends were able to operate in diesel engines without any modifications and the results showed that P20 blend had the least NOx emission quantity.
 M. Mani. Characterization and effect of using waste plastic oil and diesel fuel blends in compression ignition engine. International Journal on Energy2011 (36), 212 - 219.
 Senthilkumar Tamilkolundu. The Evaluation of blend of Waste Plastic Oil-Diesel fuel for use as alternate fuel for transportation. 2nd International Conference on Chemical, Ecology and Environmental Sciences (ICCEES'2012) Singapore April2012, 28 - 29.
 B. Rajesh Kumar, S. Saravanan. Effect of exhaust gas recirculation on performance and emissions of a constant speed diesel engine fueled with pentanol/diesel blends. International Journal on Fuel2015 (160), 217 - 226.
 Mohdafizil Mat Yasin, Rizalman Mamat. Effects of exhaust gas recirculation on a diesel engine fueled with Palm-Biodiesel. International Journal on Applied Energy2015, 30 - 36.
 K. Kaimal Viswanath, P. Vijayabalan. An investigation on the effects of using DEE additive in a DI diesel engine fueled with waste plastic oil. International Journal on Fuel2016 (180), 90 - 96.
 C. Subash, M. Mani. Performance, emission and combustion characteristics of a DI diesel engine using waste plastic oil. International Journal of Applied Thermal Engineering2009 (29), 2738 - 2744.
 Guisheng Chen, Lei Di, Quanchang Zhang. Effects of 2,5-dimethylfuran fuel properties coupling with Exhaust Gas Recirculation on combustion and emission characteristics in common rail diesel engines. International Journal on Energy2015, 284 - 293.
 P. S. Prem Kumar, S. Bhaskar Chakravarthy, S. Jayagopal, P. Radhakrishnan, S. Nataraja Pillai, C. Senthil Kumar. Investigation of Engine Oil-cooling Problem during Idle Conditions on Pusher Type Prop Aircraft, International Journal of Turbo-Jet Engines2017 (34), No. 4, 333 - 340.
 A. Chríbik, M. Polóni, J. Lach, Ľ. Jančošek, P. Kunc, J. Zbranek. Internal Combustion Engine Powered by Synthesis Gas from Pyrolysed Plastics. Journal of Mechanical Engineering – Strojnícky časopis2016 (66), No 1, 37 – 46.