9 Foods That Go On Sale When Gas Prices DropThe price you pay at the gas pump has a direct and powerful impact on the price you pay at the grocery store. When gas prices drop, it lowers the transportation costs for the entire food industry. A drop in gas prices can provide a welcome relief for the frozen food aisle. When gas prices go down, it can lead to a small but noticeable drop in the price at the shelf. A drop in gas prices can help to lower this expense, which can lead to a lower price for a loaf of bread.