Start your car every two to four weeks if it's in long-term storage. The primary goals are to maintain the 12V battery charge, circulate fluids, and prevent components from seizing. Simply idling the car for 15-20 minutes is sufficient; driving it isn't strictly necessary if it's not possible, but a short drive is highly beneficial.
The main enemy of a stored car's battery is parasitic drain from the car's computer and alarm system. Letting the engine run allows the alternator to recharge the battery. This prevents a deep discharge, which can permanently damage a lead-acid battery. Modern engines with complex electronics are particularly vulnerable.
Fluid circulation is another critical reason. Oil that sits for months can drain away from critical engine components, leading to dry starts and increased wear. Running the engine brings oil to the cylinders, turbochargers (if equipped), and other vital parts. It also cycles the transmission fluid and coolant, preventing moisture buildup and corrosion.
Don't forget about the tires. Prolonged stationary pressure can cause tire flat-spotting, where the bottom of the tire develops a temporary or permanent flat spot. Moving the car even a few feet helps redistribute the weight. For storage longer than a month, over-inflating the tires by about 5-10 PSI above the recommended pressure can help combat this.
| Storage Factor | Recommended Action | Rationale |
|---|
| Frequency | Every 2-4 weeks | Prevents battery discharge and fluid stagnation. |
| Duration | 15-20 minutes of idling | Allows engine to reach full operating temperature. |
| Ideal Activity | Short 5-10 mile drive | Best for lubricating all drivetrain components and brakes. |
| Tire Pressure | Increase by 5-10 PSI | Reduces risk of permanent flat-spotting. |
| Fuel Tank | Keep 95% full with fuel stabilizer | Prevents condensation and fuel degradation. |
