Soaring gas prices convinced me to switch over to Costco's credit card

Drivers wait to refuel vehicles at a Costco gas station in California last month. David Paul Morris/Bloomberg via Getty Images The AAA gas average is above $4 per gallon in the US and not showing signs of coming down soon. Wholesale clubs like Costco offer significant savings on fuel, especially when prices are high. I found that combining low prices with a rewards credit card takes some of the sting out of each top-up. When the US and Israel launched the war with Iran and sent the oil mark...