Thai Oil Announces Gasoline and Diesel Price Reduction

PTT and Bangchak Corporation will reduce fuel prices starting June 13, 2026, lowering gasoline prices by 0.80 baht per liter and diesel by 1 baht per liter. According to reporting from สวพ.FM91, these price adjustments take effect at 05:00.

The announcement identifies two distinct price drops across different fuel categories. Gasoline group fuels will see a decrease of 0.80 baht per liter, while diesel prices will drop by 1 baht per liter, according to สวพ.FM91.

How much will fuel prices drop on June 13?

The price reductions vary by fuel type. Diesel is receiving the steeper cut at 1 baht per liter. Gasoline products are decreasing by 0.80 baht per liter. Both changes go into effect at 05:00 on June 13, 2026, as reported by สวพ.FM91.

These adjustments apply to the retail pumps operated by PTT and Bangchak, the two largest fuel retailers in Thailand. This coordinated move typically reflects shifts in the Singapore Mean of Platts (MoPS), which serves as the primary benchmark for refined oil prices in the region.

Which companies are implementing the price changes?

PTT and Bangchak Corporation are the entities announcing the reductions. PTT operates the largest network of service stations nationwide, while Bangchak maintains a significant market share in the retail fuel sector.

The simultaneous announcement by both companies suggests a market-wide adjustment. Retailers in Thailand generally align their pricing based on the cost of imported refined products and directives or subsidies from the State Oil Fund.

Why are diesel and gasoline prices changing?

Fuel price volatility in Thailand is largely tied to the cost of refined oil in Singapore. When the MoPS benchmark drops, domestic retailers typically lower pump prices to remain competitive and reflect current replacement costs.

The larger reduction in diesel compared to gasoline often relates to the State Oil Fund’s management. The Thai government frequently uses the Oil Fund to cap diesel prices to prevent sudden spikes in transportation costs, which can drive up inflation for consumer goods.

When global diesel prices fall significantly, the government may reduce the subsidy provided through the Oil Fund, allowing the retail price to drop naturally. This helps the government recover funds or reduce the fund’s deficit.

How does this compare to gasoline price movements?

Gasoline prices generally track global market trends more closely than diesel because they are subject to fewer government price interventions. The 0.80 baht reduction for gasoline indicates a moderate decline in the cost of naphtha and other refinery inputs.

The 0.20 baht difference between the diesel cut and the gasoline cut highlights the different regulatory pressures on each fuel type. Diesel is viewed as a strategic commodity for logistics and agriculture, making its pricing more sensitive to policy decisions than gasoline, which is primarily used by private passenger vehicles.

Industry standards in Thailand dictate that price changes occur at 05:00. This timing allows service station operators to update digital pump displays before the morning peak traffic period begins.