Regular engine oil and oil filter changes are among the most important maintenance tasks you can perform to keep your vehicle running smoothly. Fresh oil helps lubricate engine components, reduce wear, improve fuel efficiency, and extend engine life.
Whether you’re a DIY enthusiast or simply want to understand the process, this guide explains how to change your engine oil and oil filter safely and correctly.
Why Is Engine Oil Important?
Engine oil performs several critical functions:
- Lubricates moving engine parts
- Reduces friction and wear
- Helps cool engine components
- Prevents sludge build-up
- Protects against corrosion
- Improves engine efficiency
Over time, oil breaks down and becomes contaminated, reducing its effectiveness.
How Often Should You Change Engine Oil?
Most modern vehicles require an oil change every:
- 10,000 to 15,000 kilometres
- Or every 12 months
Always follow the manufacturer’s recommended service intervals for your vehicle.
What You’ll Need
Before starting, gather the following:
- Correct engine oil
- New oil filter
- Socket wrench set
- Oil filter wrench
- Drain pan
- Funnel
- Protective gloves
- Axle stands or vehicle ramps
- Clean cloths or paper towels
Always check your vehicle handbook for the correct oil specification and oil capacity.
Step 1: Warm Up the Engine
Run the engine for 3-5 minutes.
Warm oil flows more easily and drains more completely.
Do not work on an excessively hot engine.
Step 2: Raise and Secure the Vehicle
If necessary:
- Park on level ground
- Apply the handbrake
- Use ramps or axle stands
- Never rely solely on a jack
Safety should always come first.
Step 3: Locate the Drain Plug
The oil drain plug is usually found at the bottom of the engine sump.
Place the drain pan underneath before removing the plug.
Step 4: Drain the Old Oil
Carefully loosen the drain plug and allow the oil to drain completely.
This may take several minutes.
Inspect the drain plug and replace the sealing washer if required.
Step 5: Remove the Old Oil Filter
Locate the oil filter and remove it using an oil filter wrench if necessary.
Be prepared for additional oil to spill out.
Before installing the new filter:
- Compare it with the old filter
- Lightly coat the new filter gasket with fresh engine oil
Step 6: Install the New Oil Filter
Screw the new filter into place by hand.
Tighten according to the manufacturer’s instructions.
Avoid over-tightening.
Step 7: Refit the Drain Plug
Once all oil has drained:
- Reinstall the drain plug
- Tighten to the correct torque specification
Over-tightening can damage the sump threads.
Step 8: Add Fresh Engine Oil
Remove the oil filler cap and insert a funnel.
Add the recommended quantity of oil slowly.
Do not overfill.
Step 9: Check the Oil Level
Wait a few minutes for the oil to settle.
Use the dipstick to check the level.
The oil should sit between the minimum and maximum marks.
Add more oil if required.
Step 10: Start the Engine
Start the vehicle and allow it to idle for a few minutes.
Check for:
- Oil leaks around the filter
- Oil leaks around the drain plug
- Dashboard oil pressure warning lights
Switch off the engine and recheck the oil level.
Step 11: Reset the Service Indicator
Many modern vehicles require the oil service reminder to be reset after an oil change.
Refer to your vehicle handbook for the correct procedure.
Common Mistakes to Avoid
Avoid these common errors:
- Using the wrong oil specification
- Overfilling the engine
- Forgetting to replace the oil filter
- Reusing damaged drain plug washers
- Failing to tighten the drain plug correctly
- Not checking for leaks afterwards
How to Dispose of Used Engine Oil
Never pour used engine oil down drains or onto the ground.
Used oil should be taken to:
- Recycling centres
- Local authority waste facilities
- Approved oil collection points
Proper disposal helps protect the environment.
Benefits of Regular Oil Changes
Routine oil changes can:
- Extend engine life
- Improve fuel economy
- Reduce engine wear
- Maintain manufacturer warranties
- Improve overall vehicle reliability
Find Engine Oil and Filters at AutoPartsOnline.ie
At AutoPartsOnline.ie, we stock a wide range of:
- Engine Oils
- Oil Filters
- Air Filters
- Fuel Filters
- Service Kits
- Garage Tools & Equipment
Whether you’re servicing your vehicle at home or preparing for your next maintenance interval, you’ll find quality products at competitive prices with fast delivery across Ireland.
Changing your engine oil and filter is one of the simplest and most effective ways to protect your vehicle’s engine. By following the correct procedure and using the right oil and filter, you can help ensure reliable performance and long-term engine health.
Always consult your vehicle handbook for exact specifications and service intervals before carrying out maintenance.