Petroleum diesel is an important fuel to fulfil the energy demand of the country. In 2019, a total of 8484 kilotonnes oil equivalent (ktoe) of petroleum diesel was produced from local refineries while 10583 ktoe was consumed (Energy Commission, 2022). The significant gap between the production and consumption volumes was filled by imports. Petroleum diesel is mainly used by light, medium and heavy-duty diesel vehicles for transportation of goods and people. The transportation sector posted the highest diesel consumption in the country i.e. 68% of the total diesel consumption in 2019 (Energy Commission, 2022). Besides on-road vehicles, diesel fuel is also used by machineries in factories, tractors in agriculture sector and boats for both fishing and transportation.