The quantification of emissions from the open chamber combustion of a 1 wt. % sulfur gasoil is presented. Three different gasoil formulations were tested in a typical burner using steam as aid for fuel injection. The components of the gasoils were derivatives of a mixture of 42 vol. % of Maya heavy crude oil with 58 vol. % of Isthmus light crude oil. The influence of fuel flow as well as oxygen concentration on the emissions of the combustion process was determined using two levels for each parameter. All NOx and SOx emissions were within the limits of the standard, where as the particulated matter went beyond the limits when a 3 wt. % oxygen concentration was used. The level of particulated matter satisfies the standard when a 5 % oxygen concentration was used. The gasoil composition was found to influence the efficiency of the burner when primary heavy oil was used to formulate the gasoil. The main effect is reflected on the increase of particulate matter emissions.