Filling up a gas-powered car with diesel or a diesel-powered car with gas is the type of mix-up that drivers never wish to ...

A Circle K gas station in Avon, Ohio, mistakenly swapped diesel and unleaded fuel, leaving customers with costly car repairs.

Circle K says it’s helping 14 customers who inadvertently filled their vehicles with the wrong fuel. The fuel station says diesel fuel was put into unleaded storage tanks and gas in diesel tanks.