is it bad to leave your car running while pumping gas

Just make sure you smoke a cig too.

When I first started driving, if I was putting in about $10 or less I would just leave it running. As I've grown up I always turn it off.

I was also told never to leave it running but wasn't really given a reason, I guess I just got in the habit eventually of turning it off regardless.

my father in law leaves his running

I was told for gas engines to turn them off, for diesel no need too

dont really understand why a gas engine would need to be turned off, there arent sparks when an engine is running and im not pouring gas on the engine...

I guess there is always that .00001% chance of something igniting.

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I think it's one of those things like telling everyone to put your phone on airplane mode for take-off and landing.

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Saves your battery.

I leave mine running when the temp is extremely hot or cold.

every newer vehicle has a fuel tank pressure monitoring sensor that's a part of the evaporative emissions system. Some are a little more sensitive than others and may turn on the check engine light.
If you've never had the light come on because of pumping with the vehicle running then you shouldn't have any problems.

Old days was because of the risk of explosions from the vapors exiting the fuel tank. That's pretty much a thing of the past now that engine vacuum pulls those vapors into the motor.

I've been driving 23 years..... never take my vehicle off while pumping gas.

I leave mine running, both my gas and diesel vehicles. Starting engines is hard on them.

Back in the day, you could have a shitload of fuel vapors make their way under the hood and into the air intake on the carb and maybe cause a backfire. With the new stuff, I don't see how that could happen.

Its deplorable.