Exxon Mobil Smart Card+™ * vs. Costco Anywhere Visa® Card by Citi * Though the Costco Anywhere Visa® Card by Citi * has no annual fee, to apply requires a Costco membership, which starts at $65.

The Exxon Mobil Smart Card+ credit card is a no-frills "cents-off-per-gallon" gas station card that can help holders save money at the pumps.