Motorists have reported breaking down a short time after buying diesel from The Mount Service Station in Shrewsbury on 1 December.
The BBC has approached the independently-owned and operated site for a comment.
The petrol station is Essar-branded. The company said: "We understand from the dealer who owns the site that some fuel was affected by water ingress into an underground fuel tank."
Read more: https://www.bbc.com/news/articles/c87l4v8g757o