File Photo: A sign reading 'closed' is displayed at a fuel station in Kotahena on the outskirts of Colombo. AFP
Regular petrol was increased to 398 rupees ($1.30) per litre, up from 317 rupees, while diesel, commonly used for public transport, rose by 79 rupees to 382 rupees.
Last week, the government ordered an eight per cent increase in retail fuel prices and introduced rationing to limit consumption.
"We hope to achieve a 15 to 20 per cent reduction in fuel consumption with the latest increase," an official at the Ceylon Petroleum Corporation said.
He said President Anura Kumara Dissanayake told them last week that the country must prepare for a prolonged conflict in the Middle East that could affect the island's energy supplies.
The president ordered a four-day workweek effective last Wednesday and asked employers to reintroduce work-from-home arrangements where possible.
The Strait of Hormuz, a key waterway through which some 20 per cent of global oil exports pass in peacetime, has been effectively closed by Iran in retaliation for the US and Israeli war against it, now entering its fourth week.
Sri Lanka imports all of its oil and also buys coal for electricity generation.
Sri Lanka buys refined petroleum products from Singapore, Malaysia, and South Korea, while crude oil for its Iran-built refinery is sourced from the Middle East.
The government has warned that the fighting in the Middle East, and a prolonged war, could seriously undermine its efforts to emerge from the economic meltdown of 2022.
Sri Lanka defaulted on its $46 billion foreign debt in 2022 after running out of foreign exchange. Since then, Colombo has secured a $2.9 billion IMF bailout.
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