The cheapest premium diesel in Merthyr Tydfil is 217.9p per litre at GULF. 3 stations with a Premium diesel price, updated hourly (data as of 2026-09-20).
217.9p GULF, TREHARRIS SERVICE STATION, CF46 5EY
220.9p ESSO, RONTEC DOWLAIS, CF48 3DA
223.9p TEXACO, VALLEY HEIGHTS SERVICE STATION, CF48 2YE