Costco Fuel Prices in Watford
Today's member fuel prices at Costco Watford (Hartspring Lane, WD25 8JS): Unleaded (E10) 142.9p per litre, updated Jul 13, 2026. Costco doesn't publish forecourt prices on its own website, so we track them from the official Fuel Finder reporting data — forecourts must report every price change within 30 minutes.
Today's Costco Member Fuel Prices
Costco Fuel Station, Hartspring Lane, WD25 8JS, Watford. Prices are for Costco members and are updated when station prices change.
About this forecourt
The Watford warehouse sits alongside Costco UK's head office, and its forecourt is one of only 21 Costco petrol stations in the country. Three grades are sold: Unleaded (E10), Super Unleaded (E5) and Diesel (B7). Fuel is for Costco members — scan your membership card at the pump.
E10 vs E5 — which one?
E10 is standard unleaded and what most petrol cars run on. E5 (Super Unleaded) has a higher octane rating and less ethanol; some older vehicles and performance engines require it. Check your fuel filler cap or handbook if unsure.
How we track this price
We record every reported price change at this forecourt, so the chart above is the station's actual history — handy for spotting whether prices are trending up before you fill up.