Answer (1 of 11): At least one poster warned of engine damage… pretty sure that isn’t a real concern. That said, the gas cap is an integral part of the emissions equipment, absolutely on anything post-1996/OBD-II. How long/far you can go before the check engine light comes on depends on the make
What happens if you run out of gas while driving? Does it damage your car's engine or just cause it to stop working until you add more fuel? - Quora
Is leaving your car keys in the ignition while the car is off waste battery life? - Quora
In 'Back to the Future 3', when the fuel line was ripped why couldn't Marty and Doc get fuel from the other DeLorean? - Quora
Can a bad gas cap cause a misfire and also a check engine light to come on? - Quora
Is it a bad sign if a car smells like gas when the AC is on? - Quora
Can I recharge my car's A/C system without the engine running? - Quora
What happens if I accidentally drive with the gas pump still attached? - Quora
What happens if you leave the gas cap off while the car is running? - Quora
If the RPM needle doesn't move when I have the engine on and I press the accelerator, does that mean the fuel pump is bad? - Quora
Do people leave their gas tank door open frequently? Is it dangerous or harmful to the vehicle? - Quora
How to tell which side the gas tank is on without leaving my car - Quora
What happens if I put non-diluted coolant in the car radiator? - Quora
What happens if you shoot a gas tank with a bullet? - Quora
If I try to fill my car gas tank with gas and can only do it very slowly even though it's empty, what could be wrong? - Quora
