Why Oil-Company Gas Cards Have Higher APR and Limited Acceptance

Open-loop cards run on Visa, Mastercard, American Express, or Discover. They work at any merchant that accepts the network. Closed-loop cards run on a private network operated by the issuer, and work only at the issuer's own locations or affiliated merchants. The distinction matters for acceptance, for rewards stacking, and for APR pricing.

Most modern oil-company cards have moved to open-loop networks. Shell's Fuel Rewards is on Mastercard. BP Rewards is on Visa. The Chevron Techron Advantage Visa is on Visa. These cards work everywhere Visa or Mastercard is accepted, with the headline per-gallon discount available only at the issuer's stations. A handful of cards remain closed-loop, including the ExxonMobil Smart Card+ and the standard Sunoco Rewards Credit Card. Closed-loop cards work only at the named brand's gas stations.

Warehouse-club gas cards (Costco Anywhere Visa, Sam's Club Mastercard) are open-loop on the major networks and work as full-purpose payment cards anywhere. The headline gas-bonus rate applies only at gas stations, but the card itself works at restaurants, grocery stores, and online.

Three forces push oil-company card APRs above mass-market averages. First, customer acquisition: closed-loop cards spend heavily on intro discounts (30 cents per gallon for 12 months on Shell, 50 cents per gallon for 60 days on the ExxonMobil Smart Card+) to attract sign-ups. The intro discount is funded by the issuer; standing-rate revenue and APR-revenue must cover the cost over the cardholder's lifetime.

Second, customer base: oil-company cards skew toward credit-builder applicants because the approval criteria are typically less stringent than premium bank rewards cards. Higher-default-risk borrowers price into higher APR pricing.

Third, interchange dynamics: when the same brand both issues the card and operates the gas station, the merchant side does not receive the standard 1.5 to 3 percent interchange fee from the issuer side that a Visa or Mastercard at a third-party gas station would. The issuer captures more transactional margin directly, but the card's revenue model relies more heavily on interest-revenue from revolvers than on interchange.

The Consumer Financial Protection Bureau supervises all consumer credit cards, including closed-loop oil-company cards. Reg Z disclosures, the 2024 Credit Card Late Fees rule, the Servicemembers Civil Relief Act 6 percent interest cap on active-duty service members, and standard billing-error dispute rights apply equally to closed-loop store cards and to mass-market Visa and Mastercard products.

Closed-loop status is purely a merchant-network distinction, not a regulatory one. If you have a billing dispute on an oil-company card, the same Reg Z 60-day billing-error rights apply. If you suspect predatory lending or improper fee charges, the CFPB complaint process accepts complaints against oil-company card issuers (typically Citi Retail Services, Synchrony Bank, or First National Bank of Omaha) the same as against any other issuer.

Open-loop vs closed-loop matters most for non-fuel use. If you want a card that handles all your spending, pick open-loop. If you want a card purely for fueling at a single network, closed-loop has structural simplicity (real-time pump discount, integrated loyalty stacking) that may be worth the limitation.

APR matters only if you might carry a balance. If you pay in full every month, APR is irrelevant. If you might revolve, the 26 to 33 percent oil-company APR compounds quickly and consumes the per-gallon discount within weeks. For revolvers, the rewards rate is misleading; the relevant question is the lowest possible APR on a card you can qualify for. The Best Low-Interest Credit Cards guide covers cards optimized for revolvers.