If you own a classic car or a weekend sports car that doesn’t come out in winter, here’s a truth worth knowing: long-term car storage done incorrectly causes more damage than actually driving the car. Sitting still is hard on a vehicle. Fluids degrade, corrosion sets in, brakes seize, and rust creeps in through places you wouldn’t think to look. At Arnpro Automotive in Croydon, John Koene and the team see the consequences of poor car storage every year, from dead batteries and seized brakes to fuel system damage and rodent nests tucked under the bonnet.
Whether you’re a car enthusiast in Croydon, Ringwood, or the Yarra Ranges, these tips for storing your classic will help you keep your pride and joy in excellent shape until it’s time to drive again.
Car Storage: How Long Is “Long-Term”?
Most Melbourne owners assume a car can sit without preparation for months at a time. It can’t. Anything over four to six weeks qualifies as long-term car storage and needs proper preparation. Melbourne winters aren’t extreme by any measure, but humidity, temperature swings, and sitting fuel are more than enough to cause real problems. Melbourne’s June relative humidity regularly reaches 80%, well above the safe threshold for stored vehicles. Studies show rust acceleration increases significantly once humidity climbs above 60%, which makes Melbourne’s winter months particularly risky for any classic car left sitting without protection.
Prepare Your Car: Pre-Storage Mechanical Checklist
Before you store your classic car, the mechanical preparation is what separates a car that fires up first go in spring from one that needs a month of work. Here’s what the team at Arnpro recommends for caring for a classic before it goes away:
Engine Oil and Coolant
- Fresh oil before storage: Old engine oil turns acidic over time and can cause internal corrosion if it sits in your engine all winter. Change the oil and filter before you put the car away, not when you take it out.
- Coolant: Check concentration and condition. Old coolant loses its corrosion inhibitors and can damage your car’s cooling system from the inside out while it’s sitting.
Brake Fluid and Brake System
- Brake fluid: Brake fluid is hygroscopic, it absorbs moisture from the air over time. This lowers its boiling point and promotes internal corrosion in callipers and brake lines. If it hasn’t been changed recently, do it before storage.
- Handbrakes: Don’t leave the handbrake engaged for long-term storage. Brake pads can bond to rotors if left clamped for months. Use a chock instead.
Fuel System
- Fuel stabiliser: Add a quality fuel stabiliser and fill the tank before putting the car away. Petrol begins to degrade after as little as 30 days, particularly in older carburettor-equipped vehicles. A stabiliser slows this process considerably.
- Carburettor-equipped classics: On older carburettor-fed engines, stale fuel can leave behind varnish deposits that block jets and passages. For very long storage periods, consider draining the carburettor float bowl completely.
Tyres
- Inflate to slightly above standard: Under-inflated tyres develop flat spots when a car sits in the same position for weeks. Push each tyre 5–10 PSI above the standard recommendation.
- Move the car periodically if possible: Even rolling forward a metre redistributes the load and helps prevent tyre deformation. If the car is truly stationary for the season, jack stands are the best option to take the weight off the rubber.
Corrosion Protection
- Apply a light oil or corrosion inhibitor to exposed metal surfaces, particularly underneath, around the chassis, and any bare metal after a pre-purchase inspection or restoration work.
Keep the Battery Healthy During Storage
A flat battery is one of the most common problems when a classic car comes out of storage. Modern European vehicles, BMWs, Audis, Porsches, draw constant parasitic current from their complex electronics, meaning they discharge much faster than a simple older vehicle when left sitting. Here’s how to keep the battery in good condition:
- Disconnect the battery: Disconnect the battery if the car will sit for more than a few weeks and you have no charger connected. On European cars, check the manufacturer guidelines first, some require a memory-saver device to avoid resetting electronics. Read more in our guide on European car battery warning signs.
- Trickle charger: The better option is a quality trickle charger (also called a maintenance charger). These smart devices keep the battery at the correct voltage without overcharging. A good charger will give you complete peace of mind that the battery won’t go flat.
- Run the engine periodically: If you do start the car during storage, run the engine for at least 15–20 minutes to let it reach operating temperature and circulate fluids properly. Short runs do more harm than good, they don’t allow moisture to circulate out of the oil.
Protect the Paint and Interior
Your classic or performance car’s body is just as vulnerable as its mechanicals. Here’s how to protect the paint and interior while it’s in car storage:
- Wash the vehicle before covering: Wash the vehicle thoroughly and wax your car before it goes under a cover. Dirt, bird droppings, and tree sap all etch into paintwork over time, trapping them under a cover accelerates the damage.
- Use a breathable car cover: Always use a breathable indoor cover or car cover rather than plastic sheeting. Plastic seals in trapped moisture and vapor, which leads to rust and paint damage underneath. A quality car cover allows the seal to breathe while keeping dust and debris off the paintwork.
- Desiccant packs inside: Place moisture-absorbing desiccant packs inside the cabin to reduce internal humidity in humid areas like Melbourne’s outer east.
- Rodent deterrents: Vermin are a real problem in garages across Melbourne’s outer suburbs and the Yarra Ranges. Plug the exhaust and air intake with steel wool or a dedicated blocker to stop rodents nesting. Rodent damage to wiring harnesses and insulation is expensive to fix.
Owning a classic car means thinking ahead. The same care that goes into a classic car restoration project should go into how you store your pride and joy each season.
Storage Options and Storage Area Considerations in Melbourne
Not every Melbourne owner has access to indoor storage that’s purpose-built, but there’s a clear hierarchy of storage options when it comes to what works:
- Best option, temperature-controlled facility: A temperature-controlled or climate-controlled storage unit maintains stable humidity and temperature year-round. Ideal humidity for stored classics is between 35% and 55%. This is the gold standard storage solution for show cars and high-value classics.
- Acceptable option, a covered, ventilated garage: A garage space with a concrete floor, good ventilation, and no rising damp is workable. Vehicle storage in this environment is manageable if you follow the other steps in this guide and use a dehumidifier.
- Avoid, outdoor storage: Outdoor storage is not recommended for classic cars or performance vehicles. Exposure to UV, rain, bird droppings, and condensation cycles is a cause of rust and paint deterioration, even with a cover on.
- Avoid, low-lying areas: Parts of Melbourne’s east are prone to seasonal flooding. A secure environment at a higher elevation or in a dedicated storage area is preferable if this is a risk in your location.
For owners without a suitable garage space at home, a number of dedicated storage facilities across Melbourne’s east offer secure storage options, including car park-style vehicle storage bays. Ask Arnpro if you need a recommendation for storage facilities in the Croydon or Ringwood area.
Good Condition: Returning the Car to Service
This is where things can go wrong for the unprepared. Before you drive a car that’s been car in storage for a season, monitor each of these before you turn the key:
- Tyre pressure: Check and reinflate to the correct specification. Tyres that sat on reduced pressure may have slight deformation at the contact patch.
- Brakes: Pump the brake pedal several times before moving. Surface rust on rotors is normal after storage, it will clear with a few careful stops.
- Fluid levels: Monitor engine oil, coolant, brake fluid, and power steering fluid. Even in a sealed system, some evaporation or minor seepage can occur over months.
- Battery charge: Monitor the battery voltage before starting. If it’s been on a trickle charger, it should be fine.
- Rodent inspection: Open the bonnet and check for signs of rodent activity, chewed wiring, nesting material, or droppings.
- Belts and hoses: Visually inspect all accessible belts and hoses for cracking or deterioration, which can worsen when rubber sits in humid areas.
For classic and performance cars, Arnpro recommends a post-storage inspection to bring your car back to tip-top shape before driving it properly. A quick check at the workshop in Croydon picks up anything the car might have developed over winter, and it’s far cheaper than a breakdown on the road. You can also read our guide on classic car ownership pitfalls for more on long-term ownership decisions.
Expert Tips from Your Local Classic Car Storage Specialists in Melbourne
These top tips for storing your vehicle apply whether you’re storing the car for one season or several. Classic and performance car owners across Melbourne, from Croydon and Ringwood through to the Yarra Ranges and beyond, trust Arnpro Automotive to prepare your car for long-term storage and bring it back to life when the season turns.
Our team is also experienced in race car preparation for Victoria’s track day circuit and full classic car restoration, so if your car storage season reveals something that needs attention, we’ve got you covered. Book a pre-storage service today and keep your pride and joy in pristine condition until it’s time to drive again
Frequently Asked Questions
Fill it. A full tank leaves less room for condensation to form inside the tank, which reduces the risk of internal rust. Add a fuel stabiliser at the same time and run the engine briefly to circulate it through the system.
Ideally, once every four to six weeks, but only if you can run the engine long enough to reach full operating temperature (at least 15–20 minutes). Short starts that don’t fully warm the engine actually do more harm than not starting it at all.
Yes. Surface rust forms quickly on bare iron rotors and is usually cleared with a few stops. But if you’ve left the handbrakes on, the pads can physically bond to the rotors over months, requiring significant work to free them. Always use a chock instead.
Melbourne’s winter humidity promotes rust, accelerates corrosion on exposed metal, causes brake fluid to absorb moisture, and can lead to mould in the interior. Above 60% relative humidity, rust acceleration increases significantly, and Melbourne peaks well above that threshold in winter.
Look for chewed wiring or insulation, nesting material (shredded paper, fabric or leaves), droppings, or a noticeable smell. Mind that your car’s engine bay is thoroughly checked before starting after storage in any garage in Melbourne’s outer suburbs or near bushland.