A little prep now saves you a lot of time and effort later, when you’re not dealing with corrosion, dead batteries, or rodents in your tailpipe. Here are nine storage tips so your classic car starts clean the day you pull it back out.
Classic Car Storage in 9 Steps
Give yourself a couple of hours and work through these steps in order.
1. Add fuel stabilizer and let it circulate
Standard gas can last 3–6 months before it starts to degrade. Even if you’re not sure you’ll be storing for that long, fuel stabilizer is a good bet. It can usually protect your engine for at least 2 years.
First, add stabilizer to the tank according to the instructions, then fill up with gas. Doing it in this order helps the stabilizer mix in. You’ll want a full tank to minimize any air space where condensation can collect and rust out your tank.
To get rid of any condensation that’s there, run the engine until the tailpipe stops dripping. This shouldn’t take more than 5 minutes, and it allows the stabilizer to circulate.
2. Change the oil
Used oil contains combustion byproducts and mild acids, and that chemistry starts working on your bearings and cylinder walls as soon as the car sits.
It’s why lubrication specialists recommend changing the oil before any storage stretch, whether it’s weeks or months.
3. Top up all other fluids
Top up your coolant, brake, power steering, and washer fluids. Full reservoirs leave less air space for moisture to accumulate and create problems.
If you need coolant, use a mix of half antifreeze and half water. This will keep your engine block from freezing, even at temperatures as low as -45°F.
If you’re already full up, and you’re in a cold-weather state, check your coolant’s freeze point with test strips or a hydrometer. Then find out how cold your storage space gets to make sure your coolant can handle it.
4. Deal with the battery
A car battery keeps draining even with the engine off. If the charge is too low for too long, a buildup of lead sulfate crystals can eat into its capacity and cranking power.
The fix is hooking up your battery to a smart maintainer. This feeds in a current but doesn’t overcharge the battery because it monitors your voltage and adjusts automatically.
If your storage space doesn’t have a power outlet, pull out the battery and store it at home. It needs to be upright, in a cool, dry spot, on a maintainer.
When you’re removing your battery, disconnect the negative terminal first, then the positive one, to reduce the risk of a spark.
5. Inflate your tires
Sitting under the car’s full weight, tires can develop flat spots, which cause heavy vibration when you’re driving.
To keep this from happening, fill your tires by 5–10 PSI over the factory specification on the door sticker. Never exceed the maximum pressure printed on the tire sidewall.
6. Use chocks
Release the parking brake because brake rotors and drums can rust to the pads over a long time in storage.
Wedge wheel chocks under the tires to keep the car in place. Our long-term car storage guide has more on this.
7. Wash and wax it
Before your car goes into storage, give it a full wash, including the undercarriage, to get any road salt off.
Then wax the exterior. Bird droppings, bug residue, and road tar will etch through your clear coat if they’re on it for too long.
Finally, vacuum the interior, clear out any food, and clean up any stains. Pests like rodents can work their way in, eating through wires in the process.
8. Seal the intake and exhaust openings
To help keep pests out, stuff steel wool or a clean rag into the exhaust pipe and air intake.
Your exhaust pipe is exactly the type of protected tunnel rodents are looking for. Once they’re in, they’ll chew through whatever they find.
Leave a note on the steering wheel reminding you to pull out those plugs before you start the car back up.
9. Use a breathable car cover
A fitted cotton or flannel cover keeps dust, UV light, and stray debris off the paint. Don’t use a plastic tarp directly against the car’s finish, because it traps in moisture and can cause tiny scratches.
For a long storage stretch, pick up a sheet of poly plastic from the hardware store and lay it down before you drive in. Concrete draws moisture up from the ground, and over months, that moisture can work its way into the undercarriage unless there’s a barrier.
What Classic Car Storage Options Cost
A 10×20 storage unit fits most cars with room to open the doors fully. On average, a 10×20 unit for a car at a storage facility costs $210 a month. If you need extra space, a 10×25 goes for about $260 a month.
High-value cars often need stable humidity and temperature year-round. Rubber seals, vinyl interiors, and paint expand and contract with temperature swings.
To minimize this damage, classic car enthusiasts recommend a storage temperature of around 50°F. If you’re lucky enough to live in a very mild climate, you might just need an insulated, enclosed space.
Otherwise, many storage facilities offer continual HVAC cooling, and this costs an extra $25–$50 a month.
Here’s what to check before you book:
- Does the facility allow vehicles in indoor units?
- Is there drive-in access to the unit you want?
- Is there HVAC cooling, sometimes called climate control, if you need it?
Another option is to rent an unused garage closer to home. Neighborhood car storage spots like these can cost up to 50% less than units at storage facilities.
Choosing the Right Space
Before you settle on a new home for your classic car, do a quick walkthrough or check photos and reviews carefully. You’re looking for:
- Moisture staining: A space that smells fine in August can become a humidity trap by January. Staining near the floor or on the walls is a sign that water gets in or wicks up from below.
- Any sign of rodents: Droppings, gnawed materials, or nesting debris, in particular.
- The condition of the floor: Cracked or unsealed concrete allows ground moisture to rise. Bringing a poly plastic sheet is extra important if the floor looks unfinished.
- Overhead clearance: Standard roll-up doors typically clear around 7–8 feet. If your car has a roof rack or antenna, measure before you book.
- Camera coverage: Gated access is standard at facilities, but check whether a camera is pointing at your unit.
- The liability cap in the rental contract: Ask directly what the maximum per-unit claim value is before you sign anything.
If you’re still figuring out insurance, call your provider before you sign anything. Storing somewhere that doesn’t meet their requirements can affect your claim.
How Often to Check on Your Classic Car
Try to stop by every 2–4 weeks to catch any issues when they’re easier to deal with. Here’s what to check for:
- Tire pressure: Cold weather in particular can reduce it, so bring a gauge.
- Rodent activity: Check the wheel wells, under the hood, and inside the car for signs of nesting, gnawing, or other damage.
- Fluid drips: Take a look under the car for pools or other signs of a leak.
- Battery charge: Make sure the maintainer is reading correctly.
- Rubber and belts: Check the wiper blades, hoses, and belts for cracking. These deteriorate faster than you’d expect on a car that isn’t being driven.
How to keep your car in good shape during a visit
You’ll want to run the car for at least 15–20 minutes. That’s enough time to warm up the engine, boil off condensation, and charge the battery. It also keeps the pumps, seals, and rings from sticking.
If something sounds wrong during a warm-up, don’t try to drive it out, have it towed to a shop.
Otherwise, taking it for a drive is better than idling, because your alternator charges better at speed, and you’ll need to use your brakes to clear away any rust on your rotors.
Find Storage for Your Classic Car
When you’re storing a high-value car, it’s easy to assume that the biggest-name facility is the best bet. But you’ve got options.
Neighbor lets you browse photos and reviews of units from national storage brands alongside car storage spaces hosted by people nearby.
Renting from a local host means consistent foot traffic and eyes on the property from someone who’s motivated to keep their own space in good shape. Eligible spaces can come with up to $50,000 in renter property protection.
On average, renters on Neighbor pay $50–$75 a month for vehicle storage, compared with the $200+ a month national average. Savings and convenience come up consistently in the 689,000+ reviews that give us a 4.9-star average rating.
Compare all your options in one search on Neighbor, or call us to talk it through.
Frequently Asked Questions
Do you need HVAC cooling for a classic car?
It depends on where you are. In an area with big temperature swings, HVAC is worth the extra $25–$50 a month. In dry, mild climates, an insulated indoor space is usually enough, especially if you’re just storing for a few months.
Should I leave gas in my classic car during storage?
Yes, fill the tank completely after you add fuel stabilizer. Run the engine for about 5 minutes so it circulates fully.
What size storage unit do I need for a classic car?
A 10×20 storage unit fits most sedan-style cars and some minivans. For a larger car, or if you’re storing other things, too, a 10×25 or 10×30 is a better bet. Double-check that the unit has drive-up access and that you’re allowed to store a car there.
Can I store a classic car in a storage unit over winter?
Yes. An indoor, drive-up unit works well for storing a classic car in the winter if you prep the car first. The fluids, fuel, battery, and tires all need attention before you start thinking about a fitted, breathable cover.
