INTRODUCTION: Despite all improvements in dental composites, marginal microleakage is one of the most common causes of resincomposite restoration failure. In order to address this concern, efforts have been focusing on dealing with different aspects of composite consistency, polymerization stresses and packing techniques. OBJECTIVES: The aim of this work is to clinically evaluate the effect of two oscillating packing instruments (ET3000 & Compothixo) on improving the outcome and the longevity of Quixfil dental packable composite in the everyday practice of general practitioners without the need for placing flowable composite underneath it. MATERIALS AND METHODS Twenty patients were selected according to specific inclusion and exclusion criteria to participate in this study. Each patient received three posterior class II cavities preparations. The cavities were divided into three groups (n=20 each) according to the method of composite packing. Test Group I: Quixfil packable composite packed with ET3000, Test Group II: Quixfil packable composite packed with Compothixo & Group III (Control): incremental placement of Quixfll composite. The twenty patients were followed up for one and a half years according to modified RYGE Criteria. All the data obtained were then statistically analyzed using Friedman test at significance level 5% (P< 0.05). RESULTS: All restorations evaluated in this study demonstrated acceptable clinical performance within the evaluation period based on the Alfa and Bravo ratings for clinically satisfactory restorations. Statistical analysis detected no significant differences between the packing techniques. CONCLUSIONS: Good clinical results can be achieved with oscillation packing techniques when using QuiXfil packable posterior composite.