Fuel prices by chain in Spain

BonÀrea is the cheapest of the 25 chains large enough to average here, at €1.50 a litre; Cepsa is the dearest at €1.81. That is €0.31 a litre — €15.56 on a 50-litre tank — for the same fuel.

#	Chain	Petrol 95	Diesel	vs market	Sites
1	BonÀrea	€1.50	€1.69	−€0.24	66
2	Esclatoil	€1.59	€1.77	−€0.16	74
3	Tamoil	€1.60	€1.75	−€0.14	30
4	Alcampo	€1.61	€1.76	−€0.14	45
5	Plenergy	€1.62	€1.76	−€0.12	396
6	Petroprix	€1.63	€1.75	−€0.11	180
7	Gasexpress	€1.64	€1.76	−€0.10	41
8	Ballenoil	€1.66	€1.77	−€0.09	421
9	Beroil	€1.67	€1.78	−€0.08	38
10	Eroski	€1.69	€1.81	−€0.06	40
11	Meroil	€1.74	€1.88	−€0.00	37
12	Q8	€1.74	€1.87	−€0.00	81
13	Shell	€1.75	€1.88	+€0.00	339
14	AVIA	€1.77	€1.90	+€0.02	98
15	Galp	€1.77	€1.92	+€0.03	450
16	Agla	€1.78	€1.88	+€0.03	49
17	Valcarce	€1.78	€1.95	+€0.03	47
18	Carrefour	€1.78	€1.93	+€0.04	146
19	Campsa	€1.78	€1.97	+€0.04	57
20	ENI	€1.79	€1.93	+€0.04	41
21	BP	€1.79	€1.95	+€0.05	147
22	Repsol	€1.80	€1.96	+€0.06	2,742
23	Petronor	€1.80	€1.97	+€0.06	162
24	Moeve	€1.81	€1.96	+€0.06	588
25	Cepsa	€1.81	€1.96	+€0.07	528

Chains with fewer than 30 priced forecourts are left out. An average over a handful of sites is a fact about those sites, not about the chain.