Numaligarh Refinery Limited (NRL) continues to supply specialised low-pour-point diesel to Bhutan, reinforcing Assam’s role in India’s cross-border energy trade. The Golaghat-based refinery has remained the sole Indian refinery supplying this high-altitude diesel to Bhutan for several years.
The fuel supports vehicles and machinery operating in Bhutan’s colder and higher-altitude regions. Moreover, NRL has reported that it exports diesel to Bhutan through Bharat Petroleum Corporation Limited, while the company continues to explore opportunities to expand its neighbouring-country business.
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High-Altitude Diesel for Bhutan Supports Mountain Operations
High-altitude diesel is designed to perform in colder conditions where conventional diesel can face operational challenges. NRL’s low-pour-point high-speed diesel can remain usable at temperatures as low as around minus 30 degrees Celsius, making it suitable for colder Himalayan environments.
Consequently, the specialised fuel has significance for Bhutan, where mountainous terrain and winter temperatures can create additional requirements for transportation and machinery. The supply also demonstrates how petroleum products from Northeast India serve markets beyond the region.
NRL has previously stated that it supplies around 2,000 kilolitres of low-pour-point diesel to Bhutan. The company has also indicated that it is examining opportunities to supply similar specialised fuel to higher-altitude areas of Nepal.
Furthermore, the company’s international business extends beyond Bhutan. NRL’s official international-trade information records diesel exports to neighbouring countries and identifies its broader strategy of strengthening commercial links under India’s Act East policy.
The Bhutan supply therefore forms part of a wider regional energy network. However, the specialised nature of the product makes the Bhutan connection particularly notable for high-altitude fuel requirements.
NRL Maintains Sole Refinery Position in India
NRL’s position as India’s sole refinery supplying high-altitude diesel to Bhutan has emerged as an important feature of its regional business. Recent reporting on the company’s operations again identified the Numaligarh refinery in Assam as the only Indian refinery supplying this specialised fuel to Bhutan.
The refinery’s location also provides a logistical advantage for Northeast India and neighbouring Himalayan markets. NRL has increasingly focused on markets in the Northeast and nearby countries, while its larger expansion project is expected to significantly increase production capacity.
The company is currently expanding its refinery capacity from 3 million tonnes per annum to 9 million tonnes per annum. According to recent statements from NRL leadership, the expansion had reached 87.1% physical progress and was expected to be commissioned by March 2027.
Moreover, the capacity expansion could strengthen NRL’s ability to serve growing fuel demand across eastern and northeastern India. The company has also identified neighbouring countries such as Bhutan, Bangladesh, Nepal and Myanmar as potential markets because of their geographical proximity.
Therefore, the Bhutan supply represents both an established business relationship and part of NRL’s wider regional expansion strategy.
Assam Refinery Expands Regional Energy Role
NRL has increasingly developed its international trade operations alongside its domestic market. Its official records show that the company has established trade links with several neighbouring and Southeast Asian countries through exports of diesel and paraffin wax.
In Bhutan’s case, NRL supplies the specialised diesel through BPCL. A 2025 parliamentary response from NRL stated that the company was exporting to Bhutan through BPCL and pursuing plans to increase exports to the country.
The company’s Siliguri Marketing Terminal also plays an important role in its distribution network. NRL states that the terminal’s road-loading facilities serve markets around Siliguri as well as adjacent areas of Sikkim and Bhutan.
Additionally, the terminal handles high-speed diesel and other petroleum products. Its strategic location provides a distribution link between NRL’s refinery operations in Assam and markets across eastern India and neighbouring Himalayan areas.
This network has become increasingly important as regional fuel demand grows. NRL’s 2024-25 annual report noted that high-speed diesel demand in the Northeast increased at a 5.2% compound annual growth rate over the previous decade, rising from 1,517 thousand tonnes in 2014-15 to 2,513 thousand tonnes in 2024-25.
The figures underline the growing importance of dependable fuel supply across the Northeast. At the same time, NRL’s cross-border operations provide an additional dimension to Assam’s position within the region’s energy economy.
High-Altitude Fuel Gains Wider Strategic Importance
The importance of specialised diesel for high-altitude regions extends beyond Bhutan. In July 2026, the Indian Army launched indigenously developed Xtreme Weather Grade Diesel, designed to remain effective at temperatures as low as minus 42 degrees Celsius.
The development demonstrates the wider demand for fuels that can operate reliably under severe winter and high-altitude conditions. However, the Army’s Xtreme Weather Grade Diesel is distinct from the low-pour-point diesel that NRL has supplied to Bhutan.
NRL’s established Bhutan supply consequently highlights an existing commercial application of specialised fuel in Himalayan conditions. Furthermore, the company’s plans to examine markets in higher-altitude parts of Nepal indicate potential opportunities beyond its current Bhutan business.
The company has also been strengthening its overall production capacity. Once the 9-million-tonne-per-year expansion stabilises, NRL expects to serve a larger market across eastern India and neighbouring countries.
Meanwhile, NRL’s international business continues to include established fuel links with Bangladesh. Its Siliguri terminal connects to Bangladesh through the India-Bangladesh Friendship Pipeline, which has a capacity of 1 million tonnes per annum and extends 130 kilometres to the Bangladesh Petroleum Corporation’s terminal at Parbatipur.
These developments place the Assam refinery at the centre of an expanding regional petroleum network. Consequently, its Bhutan diesel supply is significant not only as a specialised product arrangement but also as part of India’s broader cross-border energy trade.
Conclusion
The supply of high-altitude diesel for Bhutan remains an important part of Numaligarh Refinery Limited’s regional business. NRL has maintained its position as India’s sole refinery supplying this specialised low-pour-point diesel to Bhutan, with the fuel designed to operate in cold and high-altitude conditions.
Moreover, NRL has stated that it exports to Bhutan through BPCL and is pursuing opportunities to increase its exports. Its Siliguri terminal also provides an important logistical connection to Bhutan and other neighbouring markets.
With its refinery expansion progressing toward 9 million tonnes per annum, NRL is positioning itself to meet rising fuel demand across the Northeast and expand its regional presence. Therefore, the Bhutan diesel supply remains a notable example of Assam’s growing role in India’s cross-border energy network.
FAQs
What is high-altitude diesel for Bhutan?
High-altitude diesel is specialised low-pour-point diesel designed to perform in colder conditions. NRL has supplied this fuel to Bhutan for several years.
Which Indian refinery supplies high-altitude diesel to Bhutan?
Numaligarh Refinery Limited in Assam is currently identified as India’s sole refinery supplying this specialised diesel to Bhutan.
How much specialised diesel does NRL supply to Bhutan?
NRL Managing Director Bhaskar Jyoti Phukan previously stated that the company supplied around 2,000 kilolitres of low-pour-point diesel to Bhutan.
Through which company does NRL export fuel to Bhutan?
NRL’s parliamentary response states that the company exports to Bhutan through Bharat Petroleum Corporation Limited and is pursuing plans to increase exports.
Is NRL expanding its refinery capacity?
Yes. NRL is expanding its refinery from 3 million tonnes per annum to 9 million tonnes per annum, with recent company statements putting physical progress at 87.1% and expected commissioning by March 2027.