All the experiments are conducted at a constant engine speed (1500rpm) under the full load conditions of the engine and the results revealed that a considerable enhancement of brake thermal efficiency of the MWCNT’s than WFOME and SOME, combustion characteristics are changed when compared to neat diesel fuel and caused of biodiesel with MWCNT’s reduced in oxides of carbon (CO and CO2) unburnt hydrocarbons (UHC) oxides of nitrogen (NOX) emissions and smoke opacity. | Influence on performance emission and combustion characteristics of a diesel engine fuelled with sesame oil waste fry oil methyl esters and mwcnt s