Vehicles can also be operated in the dual mode like Petrol-CNG and Diesel-CNG. Experiments of these kinds have been conducted on vehicles by TELCO, Kirloskar Cummins Ltd., Ashok Leyland, IBP, OIL, Delhi transport Corporation and Gujarat Road Transport Corporation. The results were quite satisfactory.

The Gas Authority of India Limited (GAIL) has requested vehicle manufacturers to nominate workshops and undertake conversions on their vehicles. The actual performance could be monitored by the Indian Institute for Petroleum (IIP), Kit suppliers from Italy and New Zealand have joined hands with oil marketing companies and vehicle manufacturers to train and initiate conversion from petroleum products to CNG.

Many countries around the world, including India, have abundant reserves of natural gas. Hopefully, it is only a matter of time when things begin to take a turn for the better and CNG would be as prevalent as petroleum products.