In the present study, a four stroke, five horse power diesel engine was tested with two different fuel blends. In the first case, diesel-kerosene blends and in the second case, air and Liquefied Petroleum Gas (LPG) mixture along with diesel was tested at constant engine speed of 1500 rpm. Different engine exhaust emissions were compared using pure diesel, diesel-kerosene blends and air-LPG mixtures. With diesel-kerosene blends minimum exhaust emissions were observed at 30% kerosene blend, when compared with pure diesel emissions. Slight increase in the NOx exhaust emission was observed. With air-LPG mixtures, minimum exhaust emissions were observed at 11% LPG mixing. However, increase in NOx exhaust emission was observed. Engine performance improved and Specific Fuel Consumption (SFC) was observed to be minimal at 30% kerosene blending and decreased as compared to pure diesel value at the same brake power output. SFC was also observed to be minimum at 11% LPG mix and decreased by about 20% as compared to pure diesel value at the same brake power output. The fuel operating cost also reduced at 30% kerosene blend and further reduced at 23% LPG mixing with air.