All of the above conditions can be considered "severe driving" conditions:
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Frequent short trips: These can prevent the engine from reaching optimal operating temperature, leading to moisture buildup and increased wear.
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Hauling or towing: This adds extra strain on the vehicle's engine, transmission, and brakes.
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Driving in dusty conditions: Dust can clog air filters and other components, leading to reduced efficiency and potential damage.
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Driving in extreme hot or cold temperatures: These conditions can affect various systems in the vehicle, from the engine to the battery and tires.
Therefore, the answer is All of the above.