Your car relies on a mix of fluids and filters to stay healthy, cool, and efficient. These often-overlooked components play a big role in everything from engine performance to cabin comfort. Staying on top of them is one of the easiest ways to avoid breakdowns and costly repairs. Here’s what to keep an eye on and why it matters.
Engine Oil and Oil Filter
Oil is the lifeblood of your engine, keeping all the moving parts lubricated and cool. Over time, it breaks down and collects debris, which is where the oil filter comes in. If the oil or filter is old and dirty, your engine has to work harder—and it wears out faster. Regular oil changes are key, typically every 3,000 to 7,500 miles depending on your vehicle and driving habits.
Coolant (Antifreeze)
Your coolant regulates engine temperature and prevents overheating. It also protects against corrosion inside the radiator and other components. Low or dirty coolant can lead to big issues fast. Have it checked periodically, especially before long trips or hot summer months. Flushing the system every few years keeps it running clean and efficient.
Transmission Fluid
Transmission fluid helps your vehicle shift smoothly and keeps gears lubricated. It also helps prevent overheating. If it’s low or dirty, you might notice slipping, jerking, or hesitation when changing gears. Some vehicles require fluid changes every 30,000 to 60,000 miles, so don’t skip it just because it’s not part of every oil change.
Brake Fluid
Brake fluid draws moisture over time, which can reduce braking power and lead to corrosion inside the system. If your brake pedal feels soft or spongy, low or old fluid might be the culprit. Most manufacturers recommend a brake fluid flush every couple of years.
Cabin and Engine Air Filters
Your cabin air filter keeps the air inside your vehicle clean, while the engine air filter keeps dirt and debris out of your engine. If either gets clogged, it can reduce airflow, efficiency, and comfort. These filters are affordable and easy to replace—usually every 15,000 to 30,000 miles depending on conditions.
Final Thoughts
Fluids and filters are simple to maintain, but ignoring them can lead to big trouble. Keep them clean, topped off, and on schedule, and your car will run smoother, last longer, and perform better year-round.