FUEL at Asda's Locking Express petrol station in Weston is currently unavailable due to "possible contamination."
An investigation has been launched by Asda to discover the cause.
The supermarket has apologised for "any inconvenience caused" during this time.
Asda hasn't confirmed how long the investigation will take.
An Asda spokesperson said: “We are currently conducting an investigation into a possible contamination at our Locking Express petrol station.
"Fuel is currently unavailable whilst the investigation takes place, and we apologise for any inconvenience caused.”
A motorist has said: "Issues at Locking Asda garage this morning, incorrect petrol in pumps if you’ve used it this morning you may have an issue."
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