Many car owners put off oil changes longer than they should, thinking it's not a big deal. But skipping or delaying oil changes can lead to engine sludge buildup, increased friction, and ultimately serious engine damage.

Most manufacturers recommend an oil change every 5,000 to 10,000 kilometers, depending on driving conditions and the type of oil used. Keeping to a schedule is essential to ensure your engine runs smoothly and stays lubricated.

Ignoring the Check Engine Light

That little amber light on your dashboard is easy to ignore—until it becomes a big problem. The check engine light can indicate issues ranging from a loose gas cap to a failing oxygen sensor or catalytic converter. Driving with the light on for too long may result in costly repairs or even safety hazards. Have your vehicle diagnosed as soon as the light appears to avoid worsening the problem.

Using the Wrong Engine Oil

All engine oils are not created equal. Using oil with the wrong viscosity or type for your specific engine can cause poor lubrication, overheating, and reduced performance. Always check your owner's manual or consult a mechanic before changing or topping off engine oil. Synthetic oil may be required in modern engines, while older models might perform better with conventional oil.

Overlooking Tire Maintenance

Tires are your only contact with the road, yet many drivers neglect them. Common mistakes include driving with underinflated or overinflated tires, failing to rotate them regularly, and ignoring alignment and balancing. Improperly maintained tires wear out faster, reduce fuel efficiency, and increase braking distance. Check pressure monthly, rotate every 8,000 to 10,000 km, and inspect for uneven wear.

Skipping Brake Inspections

Brakes don't last forever, and worn-out brake pads or damaged rotors can compromise safety. Some drivers only address brake problems when they hear squealing or feel reduced braking power. However, by then the damage might already be done. Experts recommend having your brakes checked at least once a year or if you notice any change in braking performance.

Not Replacing Air Filters

A clogged engine air filter can reduce performance and fuel economy. Similarly, a dirty cabin air filter affects the air quality inside your car. Replacing these filters is simple and inexpensive but often overlooked. Most air filters should be replaced every 15,000 to 30,000 km, depending on driving environment and manufacturer recommendations.

Forgetting Coolant and Fluids

Engine coolant, transmission fluid, brake fluid, and power steering fluid are vital to your car's operation. Many people focus only on oil changes and ignore the rest. Low or dirty fluids can cause overheating, shifting problems, or complete system failure. Regularly check fluid levels and top off or flush as needed to keep your vehicle running reliably.

Delaying Battery Replacement

Car batteries don't last forever, typically 3 to 5 years. Drivers often wait until the car won't start before considering a battery replacement. Signs of a weakening battery include slow engine cranking, dim headlights, and electrical issues. Have your battery tested during routine service, especially before winter or long trips.

Improper Washing and Waxing

Washing your car incorrectly can do more harm than good. Using dish soap, rough sponges, or skipping waxing allows dirt, salt, and environmental debris to damage the paint. This can lead to rust and lower resale value. Use pH-balanced car shampoo, soft microfiber cloths, and wax the vehicle every 3–4 months for protection.

Ignoring Unusual Sounds and Vibrations

Your car often tells you something is wrong through sound or feel. Ignoring grinding noises, squeaks, rattles, or vibrations can lead to major problems. These symptoms could signal issues with suspension, brakes, or the drivetrain. If your car "feels" off, don't wait—have it checked by a professional.

What Experts Say About Regular Maintenance

According to the American Automobile Association (AAA), "Lack of regular maintenance is one of the leading causes of vehicle breakdowns." A 2022 study from Consumer Reports also found that drivers who stick to scheduled maintenance save an average of 25% on long-term repair costs. Mechanics also report that many breakdowns could have been prevented with basic checks and timely servicing.

How to Build a Maintenance Routine

Creating a maintenance checklist can help avoid these common mistakes. Use a calendar or mobile app to track service intervals. Schedule seasonal inspections, especially before winter and summer. Also, make it a habit to do quick visual checks weekly—look at tire pressure, fluid levels, and listen for unusual sounds.

Final Thoughts: Keep Your Car Happy

A well-maintained car runs smoother, lasts longer, and saves money over time. By avoiding these 10 common mistakes, you not only protect your vehicle but also ensure a safer and more enjoyable driving experience.

Do you have a maintenance habit that's worked well for you? Or maybe a lesson learned the hard way? Share your experience—your story might help another driver avoid a costly mistake.