How to properly store a car for long periods?

Why Proper Storage Matters

Leaving a vehicle unattended for months can lead to expensive and avoidable problems. According to industry findings, the most common issues from improper storage include degraded engine oil, moisture accumulation leading to internal corrosion, flat-spotted tires, a dead battery, and deteriorated fuel. A systematic preparation process mitigates these risks, preserving your vehicle's condition and value.

Pre-Storage Preparation

Begin with a thorough cleaning, inside and out. Remove all food, trash, and personal items to prevent odors and pest infestations. A clean exterior and a coat of wax protect the paint. Next, address the fluids. Change the engine oil and filter, as used oil contains contaminants that can corrode engine internals. Top off all other fluids, including coolant and brake fluid. For fuel, fill the tank completely to prevent condensation and add a fuel stabilizer, following the product's instructions, to prevent the gasoline from breaking down and clogging the fuel system over many months.

Protecting Critical Components

The battery will discharge if left connected. For storage beyond a month, the best practice is to disconnect the negative battery cable. For optimal protection, remove the battery entirely, store it in a cool, dry place, and maintain its charge with a battery tender. To prevent flat spots on tires, inflate them to the maximum pressure listed on the sidewall. If storing for six months or more, consider placing the vehicle on jack stands to take the weight off the tires and suspension. Inserting moisture-absorbing desiccant bags inside the cabin and trunk can help control interior humidity.

Choosing a Storage Location

An indoor, climate-controlled garage is ideal. If outdoor storage is unavoidable, use a breathable, high-quality car cover to protect from the elements while allowing moisture to escape; a plastic tarp can trap humidity and cause paint damage. Ensure the parking brake is disengaged to prevent the brakes from seizing; instead, use wheel chocks to secure the vehicle.

The Return to Service Checklist

When you're ready to drive the car again, perform a careful inspection. Reconnect or reinstall a fully charged battery. Check all fluid levels. Visually inspect under the hood and under the vehicle for any signs of pests or leaks. Check tire pressure and adjust it to the manufacturer's recommended spec. Before starting the engine, turn the key to the "on" position for a few seconds to allow the fuel pump to prime the system. Once started, let the engine idle and carefully check all lights, signals, brakes, and other systems before driving. Your owner's manual may have model-specific storage recommendations, which should always be your primary guide.