$350 a month at the pump is about $4,200 a year — the spend level of a real commuter with a 40-mile round trip, or a household running two cars. It feels like it should call for a "gas card." It mostly doesn't.
Here is the uncomfortable math: the best dedicated gas cards earn about 4% to 6% at the pump — roughly $168 to $252 a year on $4,200 of gas. That's the entire prize for optimizing gas — and it's smaller than what a good general card earns on everything else in the same wallet. So the card that wins a gas-heavy wallet is usually the one that earns well on everything *around* the gas, not the one with the biggest number at the pump.
Key insight
No card in this top five is a "gas card." The best dedicated gas rates here — U.S. Bank Altitude Connect's 4x on gas (about 4% effective at typical point value, ~$162/yr) or the Costco Anywhere Visa's 4% cash (~$168/yr) — top out under $200 on $4,200 of gas. That's the entire prize for optimizing the pump, and it's why the winner is Citi Strata Premier at ~$468/yr: its 3x covers gas AND this driver's groceries, dining, and travel for a $95 fee. Amex Gold's famous 4x food rates can't save it here — charged its full $325 fee (credits count only when you opt in), it nets ~$184/yr and misses the top five. If you want no annual fee at all, the Altitude Connect (4x gas, $0 fee) is the honest pick.