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No. Continually running a clogged air filter, or anything else which throws your stochiometric ratio (fuel/air mixture) can damage the cat. Running out of fuel poses more of a risk to your fuel pump. Your fuel pump is either a wet sump or dry sump one. In the case of the former, there'll typically be a gallon or two of gasoline in a recess in the fuel tank which can't be drawn out, and the fuel pump is constantly submerged in it. The risk to those is that letting your fuel run so low can cause the sediment at the bottom of the tank to get sucked into the fuel pump. In the case of a dry sump, running out of fuel definitely puts your fuel pump at risk, as the gasoline is used to also lubricate the fuel pump, hence, you do not want it running dry.

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8y ago
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8y ago

No but excess gasoline can.

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Q: Can running out of gas or coming close to running out of gas cause permanent damage to my car's catalytic converter?
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