List of Articles کارایی موتور خودروها Open Access Article Abstract Page Full-Text 1 - Optimization of petrol demand through pricing system and improving the efficiency of car engine (in the framework of autoregressive model with distribution intervals and error correction model in the period 1988 to 2016) Mohammad Reza Shahbazi Amir Hossein JanMohammadi Mahdi Sadeghi Shahdani,