Should I Turn My Car Off When Pumping Gas?

When It Makes Sense

• Good fit: You are at a modern gasoline station with clear signage that advises drivers to shut off engines before fueling, especially in enclosed or poorly ventilated canopies.
• Good fit: Your vehicle is a gasoline‑powered car that has a known fuel vapor leak or a recently repaired fuel system, so eliminating any ignition source is prudent.

When You Should Avoid It

• Warning sign: You are using a self‑service diesel pump that explicitly states diesel engines may remain running, as diesel fuel is less volatile than gasoline.
• Warning sign: You are in a rush and the station’s safety instructions do not mention turning off the engine, but you have a fully functional, well‑maintained vehicle and the area is well‑ventilated.

Pros and Cons

Pros

• Reduces the chance of a spark igniting gasoline vapors, which is the primary fire hazard during refueling.
• Complies with most station policies and local regulations, avoiding potential fines or liability.

Cons

• If you forget to restart the engine, you may be stranded or cause traffic delays, especially at busy pumps.
• In some modern cars, turning off the engine also disables electronic safety systems (e.g., automatic shut‑off) that could assist while fueling.

Decision Checklist

• Does the station display a clear “Turn engine off while fueling” sign or policy?
• Is your vehicle’s fuel system in good repair, or have you recently experienced vapor leaks?
• Are you refueling gasoline in an enclosed or poorly ventilated area where vapors could accumulate?

Alternatives to Consider

If you choose to keep the engine running, you can mitigate risk by ensuring the vehicle is in “park” (or neutral for manuals), the ignition is set to the “off” position, and you avoid operating any electrical accessories (radio, lights) that could produce a spark. Using a fuel‑catch can or refueling during cooler hours also lowers vapor formation.

Final Recommendation

For most drivers, especially those refueling gasoline at public stations, turning the engine off is the safest default. However, if you are at a diesel pump, in a well‑ventilated location, and the station does not require it, you may keep the engine running while taking standard precautions. Whenever uncertainty remains—such as with a compromised fuel system or ambiguous signage—consult the station staff or a qualified automotive professional.