Category: 🛠️ How-To & Vehicle Education

Easy-to-understand explanations and basic checks drivers can do themselves — plus guidance on when it’s time to visit a shop.

  • The Penny Test and Beyond: How to Inspect (& Maintain!) Your Tires Like a Pro

    Tires are the only point of contact between your vehicle and the road. Whether you’re commuting to work or heading out on a road trip, knowing how to “read” your rubber is essential for both your safety and your wallet. Being able to spot potential issues early is a valuable skill that provides peace of mind and ensures you aren’t left stranded.

    Here is everything you need to know to inspect your tires with confidence.

    1. The Tread: More Than Just Grooves

    Tread is designed to divert water away so your tires can maintain grip. When the tread disappears, so does your control in the rain.

    • Tread Depth: New tires typically start at 10/32″ to 12/32″. Once you hit 2/32″, the tire is legally bald and a serious safety risk.
    • The Stopping Gap: Physics doesn’t lie. On wet pavement, a car with 2/32″ of tread can take up to 100 feet longer to stop from 60 mph than a car with 10/32″. That is nearly seven car lengths—often the difference between a close call and a collision.
    • Wear Bars: Look deep inside the grooves for small, raised bridges of rubber running across the tread. If the tread is flush with these bars, your tires have reached their legal limit and need immediate replacement.

    • The Full Scan: Don’t just look at the outside edge! Turn your steering wheel all the way to one side so you can see the inner, middle, and outer tread. Tires often wear unevenly due to alignment or suspension issues.

    • The DIY Penny Test: Insert a penny into the tread with Lincoln’s head upside down. If you can see the top of his head, your tread is below 2/32″ and you need a replacement.

    Pro Tip: Temperature Matters

    Your tire pressure changes about 1 PSI for every 10°F change in temperature. When the first cold snap hits, your “Low Tire Pressure” light may come on as the air inside compresses. Conversely, tires gain pressure on blistering summer days. Checking your levels at the start of every season is a great habit to form.

    2. Spotting Unusual Wear Patterns

    Tires tell a story about your car’s suspension and alignment.

    • Chopping (Cupping): If the tread feels “wavy” or like a saw blade when you run your hand over it, your shocks or struts might be worn out.

    *Harder to see than feel; Look at the outer tread to see the height difference on every other tread, and the difference between the outer tread and middle tread on the left photo.

    • Dry Rotting: Look for tiny cracks in the sidewall or between the tread blocks. This happens as rubber compounds break down over time. If these cracks are deep, the tire is at risk of a blowout.

    3. Sidewall Damage: The Danger Zone

    The sidewall supports the weight of your vehicle. Unlike the tread, it cannot be patched or repaired.

    Tires at this stage are unsafe to drive on and should be replaced asap.

    • Cords Showing: Metal wires or fabric sticking out of the side or the tread indicates a total structural failure.
    • The “Flat-Run” Ring: If you drive even a short distance on a flat tire (right photo below driven only a couple of miles to us), the rim crushes the sidewall against the road. This creates a permanent heat ring or “crease” around the circumference. Even if the puncture is plugged, the internal structure is likely shredded.
    • Bulges and Bubbles: A “bubble” in the sidewall means the internal plys have separated. This is a ticking time bomb that requires immediate attention.

    4. Decoding the Date Code

    Tires have an expiration date. Rubber becomes hard and brittle after about six years, regardless of how much tread is left. Look for the “DOT” string on the sidewall and check the last four digits:

    • The first two digits are the week of manufacture.
    • The last two digits are the year.
    • Example: 2422 means the tire was made in the 24th week of 2022.

    Most manufacturers have a 10 maximum service life, and recommend replacing at that time, regardless of tread depth or wear. Tires will show the signs of wear listed here, and need replacing, roughly around 3-5 years.

    5. Maximize Your Investment: How to Make Your Tires Last

    Tires are a significant investment. While they will eventually wear out, how you treat them determines whether you get 30,000 miles or 60,000 miles out of a set. Here is how to extend the life of your rubber:

    Air Pressure

    Proper PSI (Pounds per Square Inch) ensures even wear, better gas mileage, and responsive handling.

    • Find Your Number: Open your driver’s side door and look for a yellow and white sticker on the door jamb. This lists the Manufacturer’s Recommended Cold Tire Pressure.
    • Crucial Note: Do not use the “Max Pressure” printed on the tire sidewall. That is the tire’s bursting point, not the recommended setting for your specific vehicle.

    How to Add Air:

    1. Remove the Cap: Unscrew the valve cap and put it in your pocket—they’re easy to lose!
    2. Connect the Air: Press the air chuck firmly onto the valve stem until the “hissing” stops.
    3. Check & Adjust: Add air in 3–5 second bursts, re-checking with a gauge until you hit the proper PSI.
    4. Bleed if Needed: If you overfill, use the small pin on the back of your pressure gauge to press the center of the valve stem and release air.
    5. Secure: Replace the cap tightly to keep dirt and moisture out.

    Regular Rotations

    Because the front and rear tires perform different tasks (steering and braking vs. following), they wear at different rates.

    • The Rule: Rotate your tires every 5,000.
    • The Benefit: This ensures even wear across all four tires, preventing you from having to replace just the front pair prematurely.

    Keep an Eye on Alignment

    If you’ve hit a bump or pothole hard, your car “pulls” to one side or the steering wheel isn’t centered when you’re driving straight, your alignment is off.

    • The Risk: Poor alignment can scrub the tread off a tire in a matter of weeks.
    • The Fix: Have your alignment checked at least once a year or immediately after hitting a significant pothole or curb.

    *Because worn suspension components are frequently the “silent” cause of alignment drift and tire damage, we include a full suspension inspection with our alignment service. This ensures we aren’t just treating a symptom, but fixing the actual problem.

    Balanced Tires, Smooth Ride

    If you feel a vibration in the steering wheel at highway speeds, your tires may be out of balance.

    • The Fix: A technician uses a machine to ensure the weight of the tire and wheel is distributed perfectly. This prevents “spotty” wear and protects your suspension components.

    Driving Habits Matter

    Believe it or not, your right foot is a major factor in tire longevity.

    • Avoid Jackrabbit Starts: Flooring it from a stop creates friction and heat that “shaves” rubber off.
    • Take Turns Gently: Hard cornering puts immense pressure on the outer “shoulders” of the tire.
    • Check the Load: Carrying unnecessary heavy weight in your trunk or truck bed increases the heat and stress on your tires, causing them to wear faster.

    Ready for a Professional Eyes-On?

    While checking your tires at home is a great first step, some issues—like alignment-related wear or internal structural damage—require a professional touch.

    Don’t leave your safety to chance. If you noticed any unusual wear patterns, bubbles, or if your tires are nearing that 6-year mark, we’re here to help. Call to schedule an appointment and let our experts ensure your vehicle is road-ready and safe!

    Sandston Automotive

    SMALL TOWN FEEL, BIG TIME SERVICE

    804-737-7206

  • Your Vehicle’s Fluids: What They Do and When to Change Them

    Let’s be honest—most people don’t pop the hood just to admire their vehicle’s fluids. But those fluids are doing a lot of heavy lifting behind the scenes. Think of them as your car’s lifeblood. Ignore them for too long, and things can get expensive… fast.

    Here’s a simple, no-nonsense breakdown of the most important vehicle fluids, what they do, and when you should be thinking about servicing them.

    Engine Oil

    What it does:
     Engine oil lubricates moving parts, reduces friction, helps control temperature, and keeps internal components clean.

    When to change it:
    Most manufacturers set their own oil change intervals, which can range anywhere from 3,000–7,500 miles (or more) depending on the engine design, oil type, and vehicle use.

    We set reminders at

    • 3,500 miles for conventional and blends &
    • 5,000 miles for full synthetic.

    If you’re doing a lot of short trips, towing, or stop-and-go driving, you may need it more often.

    We have found that some engines are more tolerant to longer gaps between oil changes while others are more sensitive to contaminants and perform best (while avoiding issues) with more frequent oil changes.

    What happens if you wait too long?
     Sludge buildup, poor lubrication, overheating, and in worst cases—engine failure. This one’s non-negotiable.

    Check out this shelf of shame post about way overdue oil changes

    Coolant (Antifreeze)

    What it does:
     Coolant regulates engine temperature, preventing overheating in summer and freezing in winter.

    When to change it:
    Typically every 30,000–60,000 miles, depending on the vehicle and coolant type.

    Signs it needs attention:
     Overheating, sweet smell, low coolant warning, or visible leaks.

    Transmission Fluid

    What it does:
     Keeps your transmission shifting smoothly, lubricates internal components, and manages heat.

    When to change it:
     Anywhere from 30,000–100,000 miles depending on the vehicle, transmission type, and driving conditions.

    Why it matters:
     Old or contaminated transmission fluid can lead to slipping, hard shifts, and very costly repairs.

    Brake Fluid

    What it does:
     Transfers force from your brake pedal to the brakes themselves. Without it, stopping wouldn’t happen.

    When to change it:
     Usually every 2–3 years.

    Fun (but scary) fact:
     Brake fluid absorbs moisture over time, which reduces braking performance and can damage brake components.

    Power Steering Fluid

    What it does:
     Helps you turn the steering wheel smoothly and easily.

    When to change it:
     Often overlooked, but typically every 50,000–75,000 miles, or if it looks dark or contaminated.

    Red flags:
     Whining noises, stiff steering, or visible leaks.

    Windshield Washer Fluid

    What it does:
     Keeps your windshield clean so you can see where you’re going (kind of important).

    When to change it:
     Top it off as needed—especially before road trips or winter weather.

    Good to know: There are many formulas on the market. To simplify you can absolutely run the blue all year long, or you can opt to switch with the seasons.

    How to Stay Ahead of Fluid Problems

    ✅ Check fluid levels regularly (or have us do it during routine service)

    ✅ Pay attention to dashboard warning lights

    ✅ Watch for leaks or puddles under your vehicle

    ✅ Follow your manufacturer’s maintenance schedule

    😉 Wearing gloves keeps your hands clean and protected from irritation

    Hydration is key (Even for cars)

    Fluids might not be flashy, but they’re critical to keeping your vehicle reliable, safe, and long-lasting. A little preventative maintenance goes a long way—and it’s always cheaper than major repairs.

    If you’re not sure when your fluids were last serviced, or you want us to take a look, stop by or give us a call. We’re always happy to help keep your vehicle running its best 🚘

    Sandston Automotive

    SMALL TOWN FEEL, BIG TIME SERVICE

    804-737-7206