-
You won’t earn miles but Costco Visa will save you the most amount of money on gas.
You get 4% back on gas, plus you will probably save 10-20 cents per gallon at Costco which is probably worth more than the miles.
https://www.citi.com/credit-cards/citi-costco-anywhere-visa-credit-card
citi.com
Costco Anywhere Visa Card by Citi — Citi.com
Apply for Costco Anywhere Visa® Credit Card by Citi, one of Citi's Best Cash Back Rewards Cards Designed Exclusively for Costco Members. Earn 2% cash back on Costco purchases in-store and at Costco.com.