Diesel from 186.9p a litre in Carmarthen, up to 191.9p — comparing 7 filling stations. Updated 27 minutes ago.
See Carmarthen on the map →At 186.9p, the cheapest diesel in Carmarthen is 3.5p below the UK average of 190.4p — about £1.92 less for a 55-litre tank. Within Carmarthen itself the spread is 5.0p a litre, so choosing the cheapest of the 7 rather than the most expensive saves about £2.75 a tank. 2 of them report being open 24 hours. 3 publish a premium diesel price as well as standard, typically 5.6p a litre more.