Should I Turn Off My Car When Getting Gas?

When It Makes Sense

• Good fit: At a traditional gasoline station where signs explicitly require engines to be off, turning off the car complies with safety rules and reduces fire risk.
• Good fit: When refueling a vehicle with a gasoline or diesel engine that is idle for an extended period (e.g., a long stop at a self‑service pump), shutting off the engine limits emissions and saves a small amount of fuel.

When You Should Avoid It

• Warning sign: If you are at a modern station equipped with advanced vapor recovery systems and the pump’s instructions state that it is safe to keep the engine running, turning the car off may be unnecessary.
• Warning sign: In extremely cold weather where restarting the engine could cause strain or where you need immediate heating for safety, keeping the engine running might be preferable.

Pros and Cons

Pros

• Reduces the risk of fuel vapors igniting, which is a primary safety concern cited by fire safety agencies.
• Stops the engine from running, which saves a small amount of fuel and cuts emissions during the refuel pause.

Cons

• If you forget to restart, you may be delayed or stranded, especially at unattended stations.
• Turning the engine off and on repeatedly can cause extra wear on the starter and battery in older vehicles.

Decision Checklist

• Does the pump or station display a clear sign that the engine must be off while refueling?
• Is the vehicle a gasoline or diesel model that relies on spark ignition, which is more sensitive to static and vapor ignition?
• Do local fire codes or regulations specifically address engine status during fueling?

Alternatives to Consider

If you prefer not to turn off the engine, you can at least switch the ignition to the “accessory” or “idle” position (if your vehicle has such a setting), keep the parking brake engaged, and avoid using the radio or other electrical accessories that could generate sparks. Additionally, using a fuel‑level sensor app can help you minimize the time the car spends at the pump.

Final Recommendation

For most drivers, the safest default is to turn off the engine while refueling, especially at stations that request it or in areas with strict fire‑safety regulations. If you are at a modern station with no such signage, the decision can be based on personal convenience, vehicle age, and weather conditions. When in doubt, follow posted instructions and consult local fire‑safety guidelines.