The cost of filling a typical 55-litre family diesel car has hit the £100 mark once again following a relentless surge in fuel prices sparked by the conflict in the Middle East. Diesel has spiked even higher, soaring nearly 17p (10%) from its 9 July conflict low to hit 181.5p per litre. The surge in prices means a full tank of diesel now costs £100 – a threshold last faced by drivers in early June. Williams commented: “Daily price rises should come to a halt and reductions should start to appear, providing the cost of a barrel stays around this level.” Petrol Diesel Unleaded daily change Unleaded change since 28/2 Unleaded % change since 28/2 Diesel daily change Diesel change since 28/2 Diesel % change since 28/2 28/02/2026 132.83 142.38 +0.2 0 0.0% +0.2 0 0.0% 15/04/2026 158.31 191.54 +0.01 +25.5 19.2% 0.0 +49.2 34.5% 28/05/2026 159.53 184.59 +0.03 +26.7 20.1% -0.21 +42.2 29.6% 06/07/2026 150.59 164.95 -0.04 +17.8 13.4% -0.27 +22.6 15.9% 09/07/2026 150.72 164.52 +0.03 +17.9 13.5% -0.08 +22.1 15.5% 05/08/2026 161.47 181.45 +0.16 +28.6 21.6% +0.35 +39.1 27.4%For more of the latest industry news, click here.