The Department of Mineral and Petroleum Resources (DMPR) corrected a significant miscalculation in South Africa's diesel price adjustment on Tuesday, reducing the announced wholesale price increase from R6.19 to R5.27 per litre for May 2026, after erroneously capturing a 93.00 cents per litre fuel levy reduction as 0.93 cents. This error, attributed to the DMPR under ANC heavyweight Gwede Mantashe, will still contribute to domestic inflation but lessens the initial steep hike, with the petrol price increase of R3.27 per litre remaining unchanged. This incident is the latest in a series of departmental blunders, including delays in mining regulations and data reporting, which have created investor uncertainty and market disruptions, as economists and petrol stations had to adjust to the revised figures.