CX-5 Oil Filter Removal: A UK DIY Guide

Maintaining your Mazda CX-5 properly is paramount for its longevity and performance, and few tasks are as fundamental as changing the engine oil and, critically, the oil filter. While it might seem daunting at first, tackling this job yourself can be incredibly rewarding, saving you money and giving you a deeper understanding of your vehicle. This guide will walk you through the essential steps, focusing specifically on the intricacies of removing the oil filter on your 2019 Mazda CX-5, ensuring a smooth and safe process from start to finish. We'll cover everything from preparation and safety to the actual removal and replacement, along with vital information on oil types and post-maintenance checks.

Before you even think about reaching for a wrench, preparation is key. A well-prepared workspace and the right tools will make the job much easier and safer. You'll need more than just a new oil filter; consider an oil drain pan, a funnel, a suitable oil filter wrench, a ratchet with the correct socket for your drain plug, clean rags or shop towels, and of course, the correct type and quantity of new engine oil. Always ensure your vehicle is on a level surface, and if lifting it, use sturdy jack stands to secure it. Never rely solely on a jack for support when working underneath your vehicle. Safety should always be your top priority.

Understanding Your Mazda CX-5's Oil Needs

Choosing the right engine oil is just as important as changing it. Modern vehicles, including your 2019 Mazda CX-5, often benefit from or even require synthetic oil. The debate between synthetic and conventional oil has many proponents on both sides, but understanding the differences is crucial for your vehicle's health.

Synthetic oil is engineered in a lab to provide superior lubrication and protection. It resists thermal breakdown better than conventional oil, which means it maintains its viscosity and protective properties over a wider range of temperatures and for longer periods. This often translates to extended oil change intervals, making it a convenient choice for those who prefer more time between services. If you want to maximise your engine's life and reduce how often you need to get under the car, synthetic is generally the preferred option.

Conventional oil, derived from crude oil, is a more traditional choice. It works perfectly well for drivers who change their oil regularly and whose vehicle manufacturers approve its use. Some vehicles allow for a synthetic blend, which is a mix of synthetic and conventional oils, offering a middle ground in terms of performance and cost.

For your 2019 Mazda CX-5, the most accurate information regarding the recommended oil type and viscosity will always be found in your owner's manual. Common viscosities for modern Mazda vehicles might include 0W-20, 0W-30, 5W-20, 5W-30, or 10W-30. Using the specified viscosity is vital for proper engine lubrication and fuel efficiency. Always double-check your manual before purchasing oil.

Recommended Oil Viscosity Examples (Always Check Your Manual)

Remember, this table is illustrative. Your owner's manual is the definitive source for your specific CX-5 model and engine.

Essential Tools and Materials

Before you begin, gather everything you'll need:

• New oil filter (ensure it's the correct one for your 2019 CX-5)
• New engine oil (correct type and quantity, as per your owner's manual)
• Oil drain pan (large enough to hold all the old oil)
• Funnel
• Socket wrench and appropriate socket for the drain plug
• Oil filter wrench (band-style, cup-style, or pliers-style, depending on access)
• Gloves (nitrile or similar)
• Safety glasses
• Clean rags or shop towels
• Jack and jack stands (if lifting the vehicle)
• Wheel chocks (for added safety)
• Torque wrench (recommended for drain plug and new filter)
• Container for old oil disposal

Safety First: Crucial Precautions

Working under a vehicle carries inherent risks, so taking proper safety precautions is non-negotiable. Neglecting these steps can lead to serious injury.

• Personal Protective Equipment: Always wear safety glasses to protect your eyes from potential drips of old oil, battery acid, engine coolant, or brake fluid. These fluids are harmful to your eyes and skin. Wearing gloves is also highly recommended to protect your hands from hot oil and other chemicals.
• Vehicle Stability: If you need to lift your CX-5 to gain access, use a sturdy hydraulic jack and immediately support the vehicle with jack stands on solid points of the chassis. Never, ever rely solely on the jack. Give the vehicle a good shake once it's on the stands to ensure it's stable before getting underneath. Engage the parking brake and consider using wheel chocks on the wheels that remain on the ground.
• Engine Temperature: It's best to perform an oil change when the engine is warm, but not scalding hot. A warm engine helps the oil flow more easily, but hot oil can cause burns. Let the vehicle cool down for 15-30 minutes after running before you start.
• Ventilation: Ensure you are working in a well-ventilated area, especially if the engine is still warm and emitting fumes.
• Fluid Disposal: Plan for how you will dispose of the old oil responsibly. Most local recycling centres or auto parts shops will accept used motor oil. Never pour it down drains or onto the ground.

Locating Key Components on Your Mazda CX-5

Familiarise yourself with the locations of the key components before you start:

• Oil Drain Plug: This is typically located at the lowest point of the oil pan, underneath the engine. It's a large bolt designed to allow the oil to drain out.
• Oil Filter: The oil filter on a Mazda CX-5 is often located on the front or side of the engine block, usually accessible from underneath the vehicle. Its exact position can vary slightly by engine variant, but it's generally cylindrical and visible.
• Oil Fill Cap: This is on top of the engine, usually clearly marked with an oil can symbol or the word 'OIL'.
• Dipstick: Also on top of the engine, it's a long, slender stick used to check the oil level. It usually has a brightly coloured handle (often yellow or orange).

Step-by-Step Guide to Draining the Oil

Once your CX-5 is safely lifted and secured (if necessary), and you have all your tools ready, you can begin:

1. Position the Drain Pan: Slide your oil drain pan directly under the oil drain plug. Ensure it's centred and has enough capacity for all the old oil.
2. Remove the Drain Plug: Using your socket wrench and the correct size socket, carefully loosen the drain plug. Be prepared for the oil to start flowing immediately once the plug is loose. It's often best to loosen it with the wrench, then finish unscrewing it by hand, pulling it away quickly to avoid getting covered in hot oil.
3. Allow Oil to Drain: Let the oil drain completely into the pan. This can take 10-15 minutes. While the oil is draining, you can move on to preparing for the filter removal.
4. Inspect the Drain Plug: Check the drain plug's washer (gasket). It's often a crush washer that should be replaced with a new one each time to prevent leaks. If yours is damaged or missing, replace it.
5. Reinstall the Drain Plug: Once the oil has fully drained, clean the drain plug and the area around the drain hole. Reinstall the drain plug, ensuring it's snug. If you have a torque wrench, tighten it to the manufacturer's specified torque (check your owner's manual or a reliable service manual – typically around 30-40 Nm, but this varies). Do not overtighten, as this can strip the threads on the oil pan.

Removing the Oil Filter from Your Mazda CX-5

This is often the trickiest part, as oil filters can be very tightly secured. Ensure your oil drain pan is positioned underneath the filter as well, as some oil will inevitably spill when it's removed.

1. Locate the Oil Filter: As mentioned, it's typically a cylindrical canister attached to the engine block, accessible from underneath.
2. Prepare for Spillage: Have some rags ready. Even if you try to be careful, oil will drip out when the filter is removed.
3. Attempt Hand Removal (Initial Check): For some Mazdas, especially if the filter wasn't overtightened during the last service, you might be able to loosen it by hand. Try gripping it firmly and turning counter-clockwise. If it budges, congratulations! Proceed carefully, as it will be full of oil.
4. Using an Oil Filter Wrench: If hand removal isn't possible, you'll need an oil filter wrench. There are several types:
   • Band-style wrench: This wraps around the filter and tightens as you apply pressure.
   • Cup-style wrench: This fits over the end of the filter like a socket and is often used with a ratchet. This is usually the neatest and most effective method if you have the correct size.
   • Pliers-style wrench: These are large pliers that grip the filter. They can deform the filter housing but are effective for stubborn filters.

   Apply the wrench and turn the filter counter-clockwise. It might take a bit of force to break it loose.

5. Careful Removal: Once the filter is loose, unscrew it slowly by hand. As you unscrew it, oil will start to trickle out. Keep the drain pan underneath. Once it's fully unscrewed, quickly pull it away and tip it upside down into the drain pan to empty any remaining oil.
6. Clean the Mounting Surface: Use a clean rag to wipe the engine's oil filter mounting surface clean. Ensure there are no old gasket remnants stuck to the engine block, as this can cause leaks with the new filter.

Installing the New Oil Filter

Installing the new filter correctly is crucial to prevent leaks.

1. Lubricate the Gasket: Take your new oil filter. Dip your finger in some of the new engine oil and apply a thin film to the rubber gasket (O-ring) on the top of the new filter. This lubrication helps create a good seal and makes it easier to remove next time.
2. Screw on the New Filter: Carefully screw the new oil filter onto the engine by hand. Make sure it threads on smoothly. If it feels like it's cross-threading, stop, back it off, and try again.
3. Hand-Tighten the Filter: Once the filter's gasket makes contact with the engine block, turn it by hand an additional 3/4 to 1 full turn. Most oil filters specify this on their packaging. You want it snug, but not overtightened. Do not use a wrench to tighten the new filter unless the manufacturer specifically instructs you to and provides a torque specification. Overtightening can crush the gasket, leading to leaks, or make it incredibly difficult to remove next time.

Refilling with Fresh Oil

With the drain plug and new filter secured, it's time to add the fresh oil.

1. Lower the Vehicle (if lifted): If you lifted your CX-5, carefully lower it back down to a level position. This is important for an accurate oil level reading.
2. Add New Oil: Locate the oil fill cap on top of the engine and remove it. Place a clean funnel into the oil fill opening. Carefully pour the recommended amount and type of new engine oil into the engine. Your owner's manual will specify the capacity (typically around 4.5 to 5 litres for a CX-5, but verify this). Pour slowly to avoid spills.
3. Check Oil Level: After pouring in most of the oil (e.g., 4 litres if capacity is 4.5), wait a few minutes for the oil to settle in the engine. Then, pull out the dipstick, wipe it clean, reinsert it fully, and pull it out again. The oil level should be between the 'MIN' and 'MAX' marks. Add more oil gradually if needed, checking the dipstick after each small addition. Do not overfill.
4. Replace Fill Cap: Once the level is correct, securely replace the oil fill cap.

Post-Change Checks and Disposal

Your job isn't quite done yet!

1. Start the Engine: Start your CX-5's engine and let it run for a minute or two. The oil pressure light on your dashboard should go out almost immediately. If it doesn't, shut off the engine immediately and recheck your work (especially the filter and drain plug).
2. Check for Leaks: Turn off the engine and wait a few minutes for the oil to settle again. Get back under the vehicle (if safe to do so, or visually inspect from the side) and check around the oil filter and drain plug for any signs of leaks. A few drips are normal initially, but steady drips or a stream indicate a problem.
3. Final Oil Level Check: Recheck the oil level with the dipstick. It might be slightly lower now that the new oil has circulated through the filter and engine. Top up if necessary.
4. Reset Service Light: Your Mazda CX-5 may have a maintenance reminder light that needs to be reset. Consult your owner's manual for the specific procedure to reset the oil change reminder. This typically involves navigating through the infotainment system settings.
5. Dispose of Old Oil: Transfer the old oil from your drain pan into a sealed container. Take it to a local recycling centre, auto parts store, or garage that accepts used motor oil. Never dispose of it in household waste or pour it down drains.

Troubleshooting Common Issues

Even with careful preparation, you might encounter a few hurdles:

• Stuck Oil Filter: If the filter is incredibly tight, try a different type of oil filter wrench. Sometimes, a cup-style wrench with an extension bar can provide better leverage. As a last resort, some mechanics will carefully drive a large screwdriver through the filter to gain leverage, but this is messy and should only be done if all other methods fail and you're prepared for significant oil spillage.
• Stripped Drain Plug: If you overtighten the drain plug and strip the threads, you're in a more serious situation. This will likely require replacing the oil pan, which is a job best left to a professional mechanic. This highlights why using a torque wrench is so important.
• Oil Leaks After Change: Most common leaks after an oil change are due to an improperly tightened drain plug, a damaged or missing drain plug washer, or a poorly seated/overtightened oil filter. Double-check these areas first.

Frequently Asked Questions (FAQs)

Q: How often should I change the oil and filter in my Mazda CX-5?
A: Mazda generally recommends oil changes every 12,500 miles or 12 months, whichever comes first, for most CX-5 models. However, severe driving conditions (e.g., frequent short trips, extreme temperatures, towing) may require more frequent changes. Always refer to your owner's manual for the definitive service schedule.

Q: Can I use any brand of synthetic oil for my CX-5?
A: As long as the synthetic oil meets the viscosity grade and API/ACEA specifications recommended in your owner's manual (e.g., API SN, ILSAC GF-5, or similar), generally, yes. Reputable brands of synthetic oil will provide excellent protection.

Q: What if I accidentally overfill the oil?
A: Overfilling with engine oil can be as damaging as underfilling. Too much oil can cause aeration (foaming) by the crankshaft, leading to reduced lubrication and potential damage to seals. If you've overfilled significantly, you'll need to drain some oil out. This can be done by carefully loosening the drain plug just enough to let a small amount trickle out, or by using a fluid extractor pump through the dipstick tube.

Q: Do I need to replace the drain plug washer every time?
A: It is highly recommended to replace the drain plug crush washer every time you change the oil. These washers are designed to deform and create a tight seal when tightened. Reusing an old, compressed washer can lead to oil leaks.

Q: My oil pressure light came on after the oil change. What should I do?
A: If the oil pressure light comes on immediately after starting the engine and doesn't go out within a few seconds, shut off the engine immediately. The most common causes are a severely low oil level (check dipstick), a loose oil filter, or a loose drain plug. Recheck your work carefully before restarting. Running the engine with no oil pressure can cause severe damage.

By following this comprehensive guide, you'll be well-equipped to perform a successful oil and filter change on your Mazda CX-5. It's a fundamental maintenance task that, once mastered, will empower you to take better care of your vehicle and save on garage costs. Remember, patience, the right tools, and strict adherence to safety procedures are your best allies.

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