The usage of CNG in South Asia is increasing gradually with Pakistan has emerged as a dominant player with highest number of CNG operated vehicles not only in Asia but the world over. Pakistan is followed by Argentina, Brazil and Iran. In addition to this, Pakistan boasts of the highest number of CNG stations across the world with over 2600 stations. This conversion of gasoline based vehicles to CNG is driven by the cheaper price of CNG as compared to petrol. The official vehicles and luxury vehicles only run on petrol in Pakistan. In Karachi, the new CNG Buses had been recently introduced by CDGK.  Except Honda, the majority of the car manufacturers in Pakistan are producing company fitted CNG kit versions. However, the hikes in CNG prices have resulted in the failing to initiate the big projects of the stakeholders in this sector. As the competition among the manufacturers will rise, the price of the CNG and Kits will eventually reduced.

CNG has emerged as a clean alternative fuel sources not only in Pakistan, but also in India and Bangladesh. The usage of CNG is required for the public transport system as per the law in Indian cities of New Delhi and Ahmadabad. The Delhi Transport Corporation (DTC) is currently operating the largest fleet of CNG buses of the world. In fact, there are many rickshaws and personal vehicles that are being converted to CNG powered technology in India and Bangladesh. The cost of the conversion is in the range of $800–$1000. There is not even a single auto rickshaw without CNG in Dhaka since 2003. The cost of CNG in India is in the range of Rs 31.47 per kg as compared with Rs. 55.00 per litre of petrol. The major benefits of CNG include immense cost savings, reduced emissions and environmentally friendly cars.