Long-Term Storage Protocol

How to Prepare a Car for Long-Term Storage

Six months in a Las Vegas garage will do more damage to a collector car than six months of weekend driving. The prep work is what decides which one you get back.

115°F
Peak Valley Summer Air Temp
160–190°F
Closed Cabin Interior Temp
40–50%
REVCity Relative Humidity
$4,800
Typical Fuel-System Rebuild
30 Days
Flat-Spot Onset On Soft Compounds

Preparing a car for long-term storage is not a checklist you rush through the afternoon before you drop it off. It is a sequence, and the order matters. Fuel gets treated before the last drive, not after. Tires get pressured up before the car sits, not once it is already resting on its sidewalls. Get the sequence wrong in a climate like this one and you are paying for it in gaskets, brake rotors and battery cells. REVCity Auto Storage runs this protocol on every vehicle that comes through the gate at 7185 Bermuda Rd, Las Vegas NV 89119. Call 725-272-1803 and we will walk your car through it with you.

Why Las Vegas Rewrites the Standard Storage Checklist

Most long-term storage advice was written for the Midwest. It assumes the enemy is cold, road salt and damp. In the Mojave the enemy is the opposite: dry, relentless heat and an ultraviolet load that runs a 10–12 index from May through September. That inversion changes what you actually need to do.

Heat accelerates every chemical process happening inside a parked car. Gasoline oxidises faster. Brake fluid pulls moisture and then bakes it. Rubber loses plasticiser and goes hard. Lead-acid battery self-discharge roughly doubles for every 15°F rise in ambient temperature, which is why a battery that would idle happily for five months in Ohio is dead in nine weeks in a Las Vegas garage. We cover the full mechanism in our breakdown of what Las Vegas heat does to a car.

The One-Sentence Version

In a hot, dry climate you are not fighting corrosion first — you are fighting evaporation, oxidation and ultraviolet degradation, and those three demand a completely different prep order than a damp-climate checklist gives you.

The second Las Vegas variable is monsoon season. July through September brings sharp humidity spikes onto surfaces that have been bone dry for months. Condensation forms on cold metal inside an otherwise arid building — the worst of both climates in the same week. A facility that only controls temperature and not humidity will let that happen. The distinction is real and it matters: see climate controlled versus temperature controlled storage.

The Correct Order of Operations

Run these steps in this order. Several of them are irreversible if you do them out of sequence — you cannot circulate stabilised fuel through an engine you have already parked.

StepTaskTimingWhy the Order Matters
1Add fuel stabiliser, then fill the tank20–30 min before final driveStabiliser must reach the injectors and rails, which only happens under load
2Drive 15–20 milesImmediately afterCirculates treated fuel; brings oil to full operating temp to boil off condensate
3Change oil and filterSame day, engine warmWarm oil carries suspended acids out; used oil left in place etches bearings over months
4Wash, decontaminate, dry completelyAfter the driveTrapped brake dust and bug residue etch clearcoat faster at elevated temperature
5Inflate tires to storage pressureOnce cool, before parkingSetting pressure on hot tires under-inflates them by 4–6 PSI when they cool
6Connect a maintainer, not a chargerAfter the car is in positionA microprocessor tender floats; a trickle charger cooks plates

Steps one through three are a single continuous session. If you stabilise the fuel and then let the car sit for a week before the oil change, you have kept the benefit of the stabiliser but lost the benefit of the warm-oil drain. Block out an afternoon.

Fuel: Fill It, Treat It, Circulate It

Pump gasoline in Nevada is E10 — ten percent ethanol by volume. Ethanol is hygroscopic and it is the reason untreated fuel becomes a problem in storage. Left alone, it separates, drops water to the bottom of the tank and attacks aluminium and zinc in the fuel system. On a carburetted classic, phase-separated fuel will varnish a float bowl solid in a single summer.

Fill the tank to roughly 95 percent. A near-full tank leaves minimal air volume for moisture to condense in, but still allows for thermal expansion. Then treat it. Sta-Bil 360 Protection is the sensible default for a modern injected car because its vapour-phase corrosion inhibitor protects the empty upper portion of the tank as well as the liquid. For a carburetted collector or anything you want protected past twelve months, PRI-G is the stronger choice — it is a refinery-grade treatment that measurably restores degraded fuel rather than only slowing decay.

Sta-Bil 360
Best for 6–12 month storage on fuel-injected vehicles. Vapour-phase inhibitor protects tank walls above the fuel line. Roughly $12 treats 20 gallons.
PRI-G
Best for 12–24 months and for carburetted classics. Restores oxidised fuel. Roughly $28 for a 16 oz bottle treating 512 gallons.
Ethanol-Free
Where available, 90-octane ethanol-free eliminates the phase-separation risk entirely. Worth the premium on a car sitting more than a year.
What Not To Do
Do not drain the tank on a steel-tanked classic. An empty steel tank rusts from the inside on the first humid monsoon night.

More on this in storing a car on ethanol-free fuel and how long fuel actually lasts in a stored car here.

Inside REVCity
Inside REVCity
Prep work only pays off in an environment that holds 50–70°F.

Fluids, Battery and Tires

Oil. Change it warm and change it last thing before storage. Used engine oil carries combustion acids and fuel dilution in suspension. Those acids do not stop working just because the engine stopped turning; they sit against bearing shells and cam lobes for however long the car rests. A $95 oil change is the cheapest insurance in this entire article.

Brake fluid. DOT 3 and DOT 4 are glycol-based and hygroscopic. Fluid that has been in the car more than two years is already carrying enough absorbed water to drop its boiling point and start pitting caliper bores. Flush before a long sit, not after.

Coolant. Check concentration with a refractometer rather than trusting the bottle. Weak coolant in a hot building is a corrosion problem in the block and heater core, not a freezing problem.

Brakes Off, Chocks On

Never store a car with the parking brake engaged. Over months, rear pads bond to rotors through a combination of pad-binder transfer and surface oxidation, and freeing them can mean new rotors. Use wheel chocks and leave a manual in gear or an automatic in park.

Battery. Use a microprocessor-controlled maintainer — a CTEK, NOCO Genius or Battery Tender Plus — not an old trickle charger. A trickle charger pushes constant current with no idea what the battery is doing, and in a hot building it will overcharge, gas off electrolyte and warp the plates. A maintainer floats at a target voltage and steps back. The distinction is explained fully in battery tender versus trickle charger. If the car has an AGM or lithium pack the charging profile is different again — see AGM versus lithium in storage.

Tires. Inflate to the sidewall maximum, or roughly 8–10 PSI above your normal cold setting, and do it when the tires are cool. Soft high-performance compounds are the most vulnerable: a set of Michelin Pilot Sport Cup 2 or Pirelli P Zero Corsa will begin developing measurable flat spots inside 30 days at normal pressure. At $600–$900 per corner, that is a five-figure mistake on a four-tire set. The physics and the fixes are in tire flat spotting in storage and how to remove flat spots afterwards.

The better answer is to take the load off entirely. Every space at REVCity has a BendPak four-post lift, and a car stored on jack stands or a lift carries zero sidewall load for the entire storage period. Here is how the lifts work.

Interior, Exterior and the Paperwork Nobody Does

Ultraviolet exposure is the single largest driver of cosmetic depreciation on a Las Vegas car. Leather dries and cracks along seat bolsters; dashboards develop the fine crazing that no amount of conditioner reverses. A UV-free enclosed building removes the variable entirely, which is why we do not sell car covers as a substitute — a cover on a car parked outdoors here traps heat against the paint rather than protecting it. That trade-off is measured in do car covers trap heat in Las Vegas.

AreaDo ThisSkip This
LeatherClean, then condition with a pH-balanced product 48 hours before storageSilicone-heavy dressings — they migrate and attract dust
CabinRemove all food, paper and fabric; crack windows 1/4" if the facility is climate controlledSealed cabin with a full ashtray and a gym bag in the back
PaintFull decontamination wash and a sealant or ceramic layerWaxing over embedded brake dust and bug etch
Rodent DeterrenceSteel wool in the exhaust tip on an outdoor-stored car; nothing needed in a sealed facilityMothballs and dryer sheets — ineffective and they permeate the interior
WipersLift the arms off the glass or slip foam under the bladesLeaving rubber compressed against hot glass for months

A ceramic coating is worth serious consideration before a long sit, because it gives you a sacrificial layer that handles the first dust cycle when the car comes out. Details in ceramic coating and car storage.

The Step Almost Everyone Skips

Photograph the car before it goes in — all four corners, both interiors, the odometer and the VIN plate. Then write down the mileage, the date, the fuel level and the tire pressures. Hagerty asks for exactly this documentation on an agreed-value claim, and a dated photo set is the difference between a smooth settlement and an argument about pre-existing condition.

How Long Is Long-Term?

The prep changes with the duration. Treat these as three different jobs, not one job at three intensities.

1–3 Months
Stabiliser optional on a full tank. Maintainer required. Tires up. No oil change necessary if the oil is fresh. This is a seasonal park, not true storage.
3–12 Months
The full sequence above. Fresh oil, treated fuel, brake fluid checked, load off the tires if possible. This is the range most collector cars actually live in.
12+ Months
Everything above, plus PRI-G rather than a standard stabiliser, a coolant flush, and a serious argument for lifting the car. Plan a mid-term inspection at month six.

What you should not do at any duration is start the car once a month and let it idle for ten minutes. It is the most widely repeated piece of bad storage advice in circulation. A ten-minute idle never brings oil to a temperature that boils off condensation, so every start adds water and unburned fuel to the crankcase and then shuts down before it can be removed. Hagerty has taken this position publicly for years, and it is the right one. The full argument is in how long you can store a car without starting it.

If you are storing seasonally because you split the year between Las Vegas and somewhere cooler, the calculus is slightly different — the snowbird guide covers the arrive-and-drive side of it.

Where REVCity Sits

REVCity sits on Bermuda Road just east of the airport, which puts it inside a 25-minute drive of essentially every collector-car neighbourhood in the valley. Drop-off and pickup do not eat a day.

Drive Times From REVCity
Harry Reid Intl Airport ~7 min · ~4 mi
The Strip / Resort Corridor ~12 min · ~6 mi
Summerlin ~25 min · ~18 mi
Henderson / Green Valley ~15 min · ~11 mi

Approximate drive times from 7185 Bermuda Rd, Las Vegas NV 89119. Actual times vary with traffic and route.

FAQ

Common Questions

How do I prepare a car for long-term storage?

Run six steps in order: add fuel stabiliser and fill the tank, drive 15–20 miles to circulate it, change the oil and filter while the engine is warm, wash and dry the car completely, inflate tires 8–10 PSI above normal while cool, and connect a microprocessor battery maintainer. Do not engage the parking brake — use chocks instead.

Should I fill the gas tank before storing a car?

Yes. Fill to roughly 95 percent and add stabiliser before the final drive. A near-full tank minimises the air volume where moisture can condense. Never drain the tank on a steel-tanked classic, because an empty steel tank rusts internally the first time humidity spikes during Las Vegas monsoon season.

Do I need to start my car while it is in storage?

No, and you should not. Short idle cycles never get the oil hot enough to evaporate condensation, so each start adds water and fuel dilution to the crankcase without removing any. Hagerty and most collector-car specialists advise against periodic start-ups. Leave the car on a maintainer and let it rest.

What tire pressure should I use for long-term storage?

Inflate to the sidewall maximum, or about 8–10 PSI above your normal cold pressure, and set it when the tires are cool. Soft compounds like Michelin Pilot Sport Cup 2 can flat-spot inside 30 days at normal pressure. Storing the car on a four-post lift removes sidewall load entirely and is the better solution.

How much does long-term car storage prep cost?

Budget $250–$450 for a thorough job: roughly $95 for an oil and filter change, $12–$28 for fuel stabiliser, $40–$120 for a quality battery maintainer, and $100–$200 for a decontamination wash and sealant. Against a $4,800 fuel-system rebuild or a $2,400 tire replacement, it is not a close call.

Is climate-controlled storage necessary in Las Vegas?

For any vehicle you care about, yes. Cabin temperatures reach 160–190°F in a non-conditioned Las Vegas building, which accelerates fuel oxidation, battery self-discharge and rubber degradation. REVCity holds 50–70°F and 40–50 percent relative humidity year-round, including through monsoon season.

DH
Written By
Dustin Hacker

Founder of REVCity Auto Storage and Nostalgia Hot Rods. Dustin has spent decades building, restoring, and protecting collector and exotic vehicles across the Las Vegas Valley. He built REVCity to be the climate-controlled facility he always wanted for his own cars. Read his story →

Prep It Once. Store It Right.

Climate-controlled space, BendPak four-post lifts and battery maintenance at every bay. Call and we will walk your car through the full protocol.

Call 725-272-1803 Request a Space

REVCity Auto Storage · 7185 Bermuda Rd, Las Vegas NV 89119 · 725-272-1803