Costco Promotional Membership (Good Timing for GM Holiday Event)

5.25% back on gas at the Platinum Honors relationship tier when you choose gas as your "3% category). 4.5% at the Platinum level. No annual fee.

I have this card but I’ve chosen online shopping for my “3% category” because we spend more in that category.

You can have multiple cards with their 3/2/1 structure where you can choose your 3% category, and that’s probably what I’ll do for gas.