It seems like Kroger is adding a little fuel to the summer fire. The grocery giant has announced a warm-weather promotion that lets shoppers save up to $35 on their next gas fill-up, turning trips to the supermarket into rewards and fuel-saving hacks. The summer series, which runs Fridays from now through July 24, is designed to help customers stretch their budgets and save more on gas while shopping for everyday essentials by earning 4X fuel rewards. Some customers were quick to point out some