Rising gas prices have lifted the fixed percentage fees that filling station owners pay for credit card processing, consuming sale profits and pushing a few owners to suspend payments by plastic. The National Retail Federation asks why gas stations must pay higher fees when the cost of processing credit or debit cards is not affected by the price per gallon.

When gas station manager Roger Randolph realized it was costing him money each time someone filled up with $4-a-gallon gas, he hung a sign on his pumps: "No more credit cards."