They have been tweeting using hashtag #DonateOilToIndianEmbassy.

India's oil demand to climb to 500 million tonnes per year by 2...
Twitter users have gathered around the embassy to 'donate' fuel.
The embassy is seeking 150 liters of fuel from NOC for every three days for it at a time when daily life has been hit hard due to acute shortage of petroleum products. 
India has been imposing blockade on Nepal expressing displeasure over the new constitution.
#DonateOilToIndianEmbassy Tweets