Diesel drops 7.5 cents a litre today, petrol adds 1.5
From today until 6 September, average diesel in mainland Portugal falls to around €1.995 while 95 petrol rises to about €2.004. The two swap places, and diesel is the cheaper fill again.
Anyone who filled up on Sunday picked the wrong day. From today until 6 September, standard diesel in mainland Portugal is expected to fall by roughly 7.5 cents a litre, taking the average price from €2.071 to somewhere near €1.995. On a 50-litre tank that is close to four euros.
95 petrol moves the other way, with far less conviction: up about 1.5 cents, to roughly €2.004 a litre.
Look at what that does to the pair. Last week diesel sat eight cents above petrol. This week it slips below, though by less than a cent. If you drive a diesel and have spent August doing arithmetic at the pump, it is the first good news of the month.
These are estimates, not an official table
Worth saying where the numbers come from. Fuel prices in Portugal are unregulated. No authority sets them, and every brand and every forecourt charges what it likes. The weekly movements everyone quotes are derived from crude and refined product quotations on international markets, which makes them forecasts rather than a table published by the state. If the government adjusts the ISP fuel tax mid-week, the sums change.
So the number that matters is the one on the forecourt nearest you, not the national average. Portugal’s energy directorate runs an official comparator listing the price at every station in the country, updated daily, and the gap between brands there is usually worth more than the gap between weeks.
What September changes
The pattern through August has been up, down, up, with little visible logic from behind a steering wheel. Last week both fuels went up, and the explanation lived in international markets, as it nearly always does. September changes the context rather than the price: the holidays end, the everyday traffic comes back, and the tank empties faster. Four euros a fill adds up quickly when you are filling twice a month.
By Beatriz Mota
Image: Tugadaily