The efficient fuel price drops this week to 2,120 euros in petrol and 2,210 euros in diesel, according to data released by the Energy Service Regulator (ERSE).
© Lusa
06/10/2026
by
Lusa
ANDthis indicator is an average weekly calculated value ERSE taking into account international quotations for refined fuels and freight, logistics, reserves, biofuels, retail and taxes.
Thus, he said that, compared to the previous week, the efficient price decreased by 1% in petrol and 1.5% in diesel.
“ This development is mainly due to the variation in international petrol and diesel prices, which are the most directly related references to the cost of fuels sold at the gas stations. In this period, the international quotations of gasoline 95 simple decreased 2.3%, and those of diesel simple decreased 2.6% ", highlighted the entity, in the same document.
In the previous week, the most recent for which data on the discounts applied are available, these were below the efficient price of 4.5 cents per litre in plain petrol 95 and 6.2 cents per litre in simple diesel, “corresponding to deviations of -2.1% and -2.8%, respectively”.
The discounted price is “a more accurate approach to the average price actually paid by consumers,” ERSE pointed out.
In relation to portico prices, “the average selling prices to the public announced in the supply stations, as reported in the Single Energy Balcony, was 0.2 cents per litre above the efficient price in gasoline 95 simple and 0.2 cents per litre below in the simple diesel”, and, in relative terms, “these differences corresponded to deviations of +0.1% and -0.1%, respectively”, he highlighted.
The Minister for Environment and Energy asked ERSE to make information on fuel prices more accessible and to propose possible legislative changes in this area, advocating an extension of the regulator's sanctioning powers to the oil system.
In a letter sent on August 28 to the President of the Board of Directors of ERSE, to which Lusa had access, Maria da Graça Carvalho begins by saying that she is “according to the recommendations” that the supervisor presented to her in a study published on August 14 on the formation and evolution of road fuel prices in Portugal.
Following this initial analysis, the minister asks the regulator to strengthen “the instruments of transparency, economic supervision and consumer information”, deepening two issues in a manner articulated with the “competent entities”.
In the study requested in July by the minister and released on August 14, ERSE recommends to the government a strengthening of transparency and supervision in the sector, but rejects there being grounds for administrative intervention in prices.
Among the measures identified are the need to “harmonize public price benchmarks and reduce the risk of incorrect interpretations between the efficient price of ERSE and the reference price disclosed by ENSE [National Energy Sector Entity]”.

