Your car’s oil filter plays a crucial role in keeping your engine healthy and running smoothly. It’s responsible for ensuring that only clean, contaminant-free oil circulates through the engine, preventing premature wear and potential damage. But like all parts, the oil filter doesn’t last forever. Over time, it becomes clogged with debris and sludge, reducing its effectiveness. That’s why replacing your car’s oil filter at regular intervals is vital. In this guide, we’ll explore why changing an oil filter is so important, what’s involved in the process, and whether it’s a job you can tackle yourself.
Quick Answer: Regularly changing your car’s oil filter ensures clean oil flows through the engine, preventing wear, improving performance, and avoiding costly damage. A clogged filter can restrict oil flow, trigger warning lights, and cause oil leaks—so don’t skip this essential maintenance!
The Role of an Oil Filter
Before we dive into why you should replace your oil filter, it helps to understand its function. Every time your engine runs, motor oil lubricates its moving parts, reducing friction and dissipating heat. However, as oil circulates, it picks up contaminants such as dirt, metal particles, and carbon deposits. Without a properly functioning filter, this unfiltered oil could damage critical engine components, leading to costly repairs.
The oil filter traps these contaminants, keeping the oil clean so it can continue doing its job. However, as the filter becomes saturated with debris, it gradually loses its ability to filter oil efficiently. This is when problems start to arise.
What Happens If You Don’t Change Your Oil Filter?
Neglecting to change your car’s oil filter can lead to a series of issues, including:
1. Reduced Oil Flow
A failing oil filter becomes clogged with debris, restricting the flow of oil to your engine. When this happens, the engine doesn’t receive adequate lubrication, leading to increased friction and potential overheating.
2. Lower Oil Pressure
Your vehicle’s oil pump works hard to circulate oil through the engine. If the filter is clogged, it could mean there’s insufficient oil flow to your engine – so the pump has to work even harder, which can trigger the oil pressure warning light on your dashboard. Ignoring this warning can result in severe engine damage.
3. Contaminated Oil Circulating in the Engine
Once an old oil filter becomes completely clogged, unfiltered oil may bypass the filter altogether, allowing harmful contaminants to reach the engine’s moving parts. This can lead to excessive wear, poor performance, and even engine failure over time.
4. Increased Risk of Oil Leaks
A blocked filter can cause oil to back up in the system, leading to pressure buildup and possible oil leaks. If you notice oil stains under your car, it could be a sign that your filter needs replacing.
How Often Should You Change Your Car’s Oil Filter?
The general rule of thumb is to replace the oil filter every time you perform an oil change, which is typically every 5,000 to 10,000 km, depending on your vehicle and the type of oil used. If you use synthetic oils, you may be able to go a bit longer between changes, as they last longer and provide better lubrication. However, always check your owner’s manual for the manufacturer’s recommendations.
What’s Involved in Changing an Oil Filter?
Changing an oil filter is a relatively simple task that can be done at home if you have the right tools and knowledge. Here’s an overview of the process:
1. Gather Your Tools and Supplies
To change your oil filter, you’ll need:
- A new oil filter (ensure it’s the correct type for your vehicle)
- Fresh engine oil
- An oil filter wrench (to help remove the old filter)
- A wrench or socket set (for the oil drain plug)
- A drain pan to collect the old oil
- A funnel and some shop rags for cleanup
2. Drain the Old Oil
Start by warming up your engine for a few minutes—this helps the oil flow out more easily. Turn off the engine, locate the oil drain plug, and place your drain pan underneath it. Unscrew the plug and let the old oil drain completely.
3. Remove the Old Oil Filter
Using an oil filter wrench, carefully unscrew the old oil filter. Be prepared for some oil to spill out. Check the old filter to make sure the rubber gasket isn’t stuck to the engine—if it is, remove it before installing the new filter.
4. Install the New Oil Filter
Before installing the new oil filter, apply a small amount of fresh oil to the rubber gasket. This helps create a better seal and prevents the gasket from sticking next time you change it. Screw the new filter into place by hand until it’s snug, then give it another quarter turn—no need to overtighten.
5. Refill with Fresh Oil
Replace the drain plug and use a funnel to pour in fresh oil. Be sure to use the correct type and amount of oil for your vehicle.
6. Check for Leaks and Test
Start the engine and let it run for a few minutes. Check around the filter and drain plug for any oil leaks. Turn off the engine, wait a few minutes, and then check the oil level with the dipstick. Top up if necessary.
Find a Trusted Mechanic Near You
Not sure where to go for an oil filter change? Auto Hero makes it easy to compare local mechanics and find the best service for your car. Whether you’re due for an oil change or just want to keep your engine in top shape, we’ve got you covered. Simply enter your location, compare services, and book with confidence.
Keeping your engine happy starts with the basics—clean oil and a fresh filter. So don’t put it off! A quick oil filter change today can save you from bigger headaches (and expenses) down the road.
Should You Change the Oil Filter Yourself or Visit a Mechanic?
If you’re comfortable working on your car and have the necessary tools, changing the oil filter yourself can save you money. However, there are some instances where it’s best to leave the job to a professional:
- If your car has a difficult-to-reach oil filter, requiring specialized tools
- If you’re unsure about using an oil filter wrench and risk damaging the filter or engine components
- If you’re dealing with persistent oil leaks that may indicate a deeper issue
- If you want the peace of mind of a professional inspection to check for other potential problems
Most mechanics include an oil filter change as part of a routine oil change, making it a convenient option for those who prefer to avoid the hassle.
Final Thoughts
Your car’s oil filter may be small, but its role in protecting your engine is huge. Regularly changing your oil filter helps maintain smooth engine performance, prevents costly repairs, and extends the life of your vehicle. Whether you choose to do it yourself or visit a mechanic, keeping up with this essential maintenance task ensures your car stays in top shape.
So next time you’re due for an oil change, don’t overlook the oil filter—a small investment that can save you from major headaches down the road.
Written By
Matt Banks
Matt is the founder of Autohero.com.au and has been hooked on cars and repairs ever since childhood.
A veteran in automotive since leaving school, Matt has completed his trade as a panel beater and is across all things with wheels.
His first car was a 1967 FORD XR Wagon followed by a string of collectable Holden’s.
Have a question for Matt? leave a comment below.