In February, Sri Lanka's daily consumption of diesel stood at around 40,000 tons, according to a former energy minister.
Dhananath Fernando of the Advocata Institute think tank said social unrest over the shortages was highly likely, even as Sri Lanka attempts to reach a preliminary agreement by the end of the delegation's visit on June 30, with any serious relief funds still months away.
Bondholders expect the IMF visit to give clarity on how much debt Sri Lanka can repay and what reduction in asset value investors may face, analysts said.
"Even if a staff-level agreement is reached, final programme approval will be contingent upon assurances that official creditors, including China, are willing to provide adequate debt relief," said Patrick Curran, senior economist at U.S. investment research firm Tellimer.