List of Articles Lean-burn Open Access Article Abstract Page Full-Text 1 - Experimental Study and Comparison of a Few Lean (gasoline-natural gas) Dual Fuels Based on Safe Optimum Spark Advance سیدکاظم یکانی ابراهیم عبدی اقدم مهرداد سرابی 10.30495/ijim.2022.19651 Open Access Article Abstract Page Full-Text 2 - Experimental study of The Performance and e xhaust gas emissions Response of A Spark Ignition Engine to Adding Natural Gas to Gasoline in CR=11 S. K. Yekani E. Abdi Aghdam F. Sadegh Moghanlo