"The evolution of quotations in euros points to a rise in prices of 3 cents per litre for gasoline and 1.5 cents per litre for diesel," a source from one of the main national oil companies told Executive Digest.

In the same vein, the prices of gas stations next to supermarkets follow the market trend, with an "increase of 0.0109 euros in gasoline and an increase of 0.0275 euros in diesel," said another source.

Fuel prices have been rising for three consecutive weeks. In this period, diesel has already risen by 5.4 cents while gasoline costs 4.5 cents more per litre. This means that filling a tank with 60 litres of petrol costs 2.70 euros more. The invoice to top up a tank of diesel is about 3.2 euros more expensive.

With the increases expected next week, filling up the car with 60 litres of diesel will be five euros more expensive and filling the tank with gas will cost almost four euros more compared to the second week of the year.

Data from the Directorate General for Energy and Geology (DGEG) show that the average price of a litre of simple diesel in Portugal currently costs 1.606 euros per litre, while that of simple gasoline 95 is worth 1.688 euros.

The European Commission's latest fuel bulletin indicates that Portugal has the 8th most expensive 95 petrol in Europe, about 1.1 cents below the European average and 14 cents more expensive than Spain. Diesel, on the other hand, occupies the 13th position in the European ranking.

Among the EU countries, Denmark has the most expensive petrol on the Old Continent: 1,965 euros. Finland, on the other hand, 'reigns' in diesel: 1,777 euros.