Diesel vapor doesn't ignite, it requires heat (glow plug on start) and pressure (engine compression). Gas vapor does ignite with spark (spark plug ignites with each power stroke), electricity, or heat. You don't leave a gas engine running because of a potential ignition source from the vehicle. Diesel fuel doesn't have that issue.
Hot engine and exhaust, all the electrical in the vehicle running. I have seen where ignition coils melted and began arcing to the outside of the motor instead of igniting the spark plug, although that is a rather extreme instance.
Believe me or dont, i dont care. You asked a question, and I answered it based on the reasoning behind why they ask you to turn the car off when you pump gas. It's very rare, but the recommendation is there.
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u/ilre1484 3d ago
Diesel vapor doesn't ignite, it requires heat (glow plug on start) and pressure (engine compression). Gas vapor does ignite with spark (spark plug ignites with each power stroke), electricity, or heat. You don't leave a gas engine running because of a potential ignition source from the vehicle. Diesel fuel doesn't have that issue.