The objective of this study was to compare the effects of olive oil sediment (OOS) with soybean oil soap stock (SOY) traditionally used in poultry rations, on broilers growth performance, dressing proportions, carcass cut, blood lipid metabolites and meat quality (i.e. water holding capacity, WHC; colony forming unit, CFU). A total of 416 day-old Cobb-500 chicks were used in this experiment. Birds were divided into 2 experimental treatments of 208 birds in each. Each treatment was composed of 8 replicates with 26 birds in each. Oil supplements were added (day 22) to the finishing diets at a level of 30 g/kg diet. Chicks fed the OOS had a better (p < 0.05) feed conversion ratio (FCR) compared to those of the SOY fed birds. Similar effect of OSS on the dressing proportions was observed. Carcasses of broilers fed the OOS had higher (p < 0.05) WHC compared to that of SOY fed broilers. The OOS resulted in more than 100 % improvement in WHC compared to the traditionally used SOY. Carcasses of SOY fed broilers had more (p < 0.05) CFU count compared to that of birds fed OOS diets. Levels of all tested blood metabolites at day 28 and 35 compared to the baseline levels (day 21), prior to oil supplementation, were significantly affected by the type of oil.