Shelter · Living in Your Vehicle
When the car is home, maintenance is rent.
A five-minute monthly check, a free recall lookup, and oil changes on schedule. Small habits that keep your shelter running, on a budget you can live with.
The monthly checkBy Dan Whelan, founder of New World Survival
Researched from government agencies, university extension services, and other published sources. See our sources
What this guide covers
Why does maintenance matter more when you live in your car?
For most drivers, a breakdown is a bad day. When the car is also your bedroom, your pantry, and the way you get to work or the vet, it is your whole household on hold. The good news is that the habits that prevent most trouble are cheap and quick.
This guide covers the car-living version: a monthly tire check from the National Highway Traffic Safety Administration (NHTSA), free recall repairs, oil and warning lights, and how to budget for upkeep. For the full household version, see vehicle readiness, and for trouble on the road, breakdowns and emergencies.
The monthly check
How do you check your tires once a month?
NHTSA recommends checking the pressure of all tires, including the spare, at least once a month, and checking the tread at the same time.[1] All you need is a tire pressure gauge and a penny.
Check them cold
NHTSA says to check when the tires are cold, meaning the car has not been driven for at least three hours. For a car you sleep in, first thing in the morning works well.[1]
Use the door label
The right pressure is on the Tire and Loading Information label on the driver's door edge, or in your owner's manual. It is the number the vehicle maker lists, not the one printed on the tire.[1]
The penny test
Put a penny in the tread with Lincoln's head upside down and facing you. If you can see the top of his head, NHTSA says replace the tire. Tires are not safe once the tread is worn to 2/32 of an inch.[1]
Your dashboard tire light helps, but NHTSA says the tire pressure monitoring system is not a substitute for regular tire maintenance.[1] Low pressure also costs you fuel: FuelEconomy.gov estimates about 0.2% lower gas mileage for every 1 psi drop in average pressure.[2]
Free repairs
Does your car have a free repair waiting?
A safety recall repair costs you nothing. NHTSA says to contact your local dealership to fix the recalled part for free, and manufacturers must fix the defect by repairing or replacing the part, or by offering a refund.[3] If you have moved around, a recall letter may never have reached you, so check for yourself.
Look it up in two minutes
Go to NHTSA.gov/recalls and enter your 17-character vehicle identification number (VIN), which is on the lower left of the windshield and on your registration card, or search by license plate. The lookup covers safety recalls up to 15 years old.[3] A public library computer works fine for this.
If something comes up
Follow any interim safety guidance the manufacturer gives, then schedule the free repair with a dealership.[3] Ask how long the repair takes, so you can plan where you and your pets will spend that time.
Get alerts on your phone
NHTSA's free SaferCar app sends an alert when it finds a safety recall for the vehicle you entered, so you do not depend on mail.[3] NHTSA also encourages checking twice a year, when the clocks change.[4]
Under the hood
What else keeps the engine healthy?
Your owner's manual is the authority for your car. If you do not have one, check the automaker's website.
Oil on schedule
Follow the oil change interval in your manual, and use the grade it lists. FuelEconomy.gov says the recommended grade can improve gas mileage by 1% to 2%, and the wrong grade can lower it by the same.[2] Some manuals list a separate schedule for hard use. If your car idles a lot, ask a mechanic which one fits.
The check engine light
When it comes on, FuelEconomy.gov advises having the vehicle inspected by a mechanic.[2] Some auto parts stores will read the code for free, which tells you what you are dealing with before you pay for a repair.
Old tires, good tread
You cannot see tire aging. NHTSA notes some vehicle and tire makers recommend replacing tires six to 10 years old regardless of tread. The last four digits of the tire identification number on the sidewall give the week and year it was made.[1]
Sleeping in the car adds one more check. CDC says a small exhaust leak can lead to carbon monoxide building up inside the car, and advises having a mechanic check the exhaust system every year.[5] See sleeping warm in your vehicle for the full carbon monoxide guidance.
On a budget
How do you afford upkeep on a fixed income?
Treat car upkeep as a monthly bill, the way rent used to be.
Set it aside every month
Pick an amount you can keep up, even a small one, and put it somewhere you will not spend it. When an oil change or a tire comes due, the money is already there.
Spend on the cheap fixes first
A tire gauge, air at a gas station, a free recall repair, and oil on schedule cost little and prevent the costly breakdowns. Get a written estimate before any larger repair, and a second one if the price surprises you.
Ask about repair help
Some areas have charities or programs that help with car repairs for people on low incomes. Call 211 and ask what is near you.
Go easy on the battery
When the engine is off, anything plugged into the car runs on the starting battery. Power your fan, lights, and phone from a separate battery power station instead. See power for car living. A small jump starter in the trunk means a dead battery does not leave you waiting for help.
Life with Taz
"If it breaks down, then all you got is a tomb."
Darlene's take. For Darlene, the easiest part of car living is no rent and no utility bills. If you stay frugal, she says, that money covers eating right, the vet for Taz, and oil changes on schedule. She also keeps the engine off as much as she can. Running the car day and night wastes gas and wears out the engine.
Reviewed by Darlene, who lives in her car with her dog Taz.
Common mistakes
What people get wrong about car upkeep.
"I fill to the number on the tire."
That number is the tire's maximum. Use the pressure on the driver's door label.[1][2]
"The spare can stay on for now."
NHTSA says not to use your spare as a replacement for worn tires.[1] Get the flat repaired or replaced and put the spare back.
"I never got a recall letter, so there is none."
Recall letters come by mail, so a move can mean you never see one. Check your VIN yourself at NHTSA.gov/recalls.[3]
"The tire light will tell me."
NHTSA says the warning system does not replace a monthly check with a gauge.[1]
Sources
- NHTSA. "Tires." nhtsa.gov. Accessed 2026-11-02.
- U.S. Department of Energy and EPA. "Keeping Your Vehicle in Shape." fueleconomy.gov. Accessed 2026-11-02.
- NHTSA. "Check for Recalls." nhtsa.gov. Accessed 2026-11-02.
- NHTSA. "U.S. DOT Reminds Public to Check for Recalls as Clocks Spring Forward." nhtsa.gov. Accessed 2026-11-02.
- CDC. "Carbon Monoxide Poisoning Basics." cdc.gov. Accessed 2026-11-02.
Continue
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This section
Living in your vehicle
The full set of guides for car living: warmth, power, food, a dog in the car, parking, hygiene, and keeping the car running.
All vehicle guidesOn the road
Breakdowns and emergencies
Flat tires, dead batteries, overheating, and what to do when something fails while you are driving.
If something fails