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Yes, every car should have a gas cap for a number of reasons. 1) in the event of an accident a gas cap is designed to prevent fuel from leaking out of the fuel filler pipe (especially in roll over situations), minimizing the chance of a fire; 2) the gas cap keeps gasoline from evaporating into the atmosphere, which is bad for the environment and a potential fire hazard; 3) in vehicles equipped with OBDII diagnostics, you will get a "check engine light" if a fuel cap is not in place and tightened properly.

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15y ago

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