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Mazda CX-5 2.5L I4 Engine Oil Change Guide
How to change the motor oil and filter in a 2017 to 2022 Mazda CX-5 with the Skyactiv-G 2.5L I4 engine.

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2019 CX-5 2.5L I4 Engine
Partially Remove Dipstick
Twist Off Oil Fill Cap
This automotive maintenance tutorial was specifically written to assist owners of the second generation (2017, 2018, 2019, 2020, 2021 and 2022) Mazda CX-5 SUV in changing the motor oil and replacing the oil filter on the Skyactiv-G 2.5 liter N/A (naturally aspirated) inline four cylinder engine.

(The procedure may be the same or very similar for the 2.0L N/A I4, 2.5L turbo I4 and the Skyactiv-D 2.2L twin turbocharged I4 diesel engine.)

Owners of other Mazda vehicles such as the CX-3, CX-30, CX-7, CX-9, Mazda3, Mazda6, MX-30, MX-5 Miata, Mazda2, CX-4, CX-8 and BT-50 may also find these DIY instructions to be helpful.

A few compatible replacement oil filters with their part numbers are as follows: Fram PH6607, K&N HP-1008, Purolator PL14612, Bosch 3323, Wix 57002 and Mobil 1 M1-108.

Please verify the correct oil filter part numbers for your vehicle before making a purchase.

The tools and other items needed to complete this procedure include a floor jack, two jack stands, an 8mm socket with a 1/4" drive ratchet (or a Phillips head screwdriver), a flat head screwdriver, a 17mm socket, a 3/8" drive ratchet, a used oil catch container, a Lisle 63600 oil filter wrench (optional) and an automotive funnel.

The recommended oil viscosity for this 2019 CX-5 is SAE 0W-20 and you'll need to buy at least 5 quarts.

The Skyactiv-G 2.5L I4 engine's total oil capacity specification for an oil change with a filter replacement is 4.8 U.S. quarts (or 4.5 liters).

Please double check your owner's manual to verify the correct oil weight recommendation for your climate and the oil capacity specification.

The first step is to warm up the engine for a few minutes or perform this procedure after a short drive. Warming up the engine will help suspend any contaminants within the old oil and also allow it drain out more quickly.

Drive the SUV on to a level surface, shift the transmission into "Park" and turn off the ignition.

Engage the emergency / parking brake and place wheel chocks on both sides of the rear tires to help prevent the vehicle from moving.

Then open the hood, partially remove the dipstick an inch or two and twist off the oil fill cap in the counterclockwise direction.

Set the oil fill cap aside in a safe place.

Removing the fill cap and lifting out the dipstick a bit will help prevent a vacuum from forming and also allow the old oil to drain out more quickly.


Raise Front of SUV
Oil Service Access Cover
Loosen Counterclockwise
Carefully raise the front of the SUV with the floor jack and securely support it with at least two jack stands.

I just raised the front passenger side of the vehicle for easy access to the oil service access cover.

Locate the oddly shaped oil service access cover on the passenger side of the engine bay.

Loosen the two black metal screws by turning them in the counterclockwise direction with the 8mm socket and a 1/4" drive ratchet (or a Phillips head screwdriver).

First Screw Location
Second Screw Location
Unlock Two Pop Rivets
Set the two screws aside in a safe place.

There are also two black plastic pop rivets that secure the access cover in place.

Use a flat head screwdriver to pry out the button head in the center of the pop rivet to unlock them.

Remove Pop Rivets
Slide Out Access Cover
Access Cover Removed
Once the pop rivets are unlocked, you can pry out the base of the fastener.

Set the two pop rivets aside with the screws.

Slide the oil service access cover towards the rear of the vehicle to release the retaining tabs from the under engine cover (or splash guard).

Oil Filter & Oil Pan
Oil Drain Bolt Location
Used Oil Catch Container
The black metal drain bolt is situated on the rear edge of the oil black metal oil pan.

The old oil filter is situated just behind the oil pan which is a bright blue color on this 2019 CX-5.

Slide the used oil catch basin to just below the drain bolt.

Loosen Counterclockwise
Drain Out Old Oil
Spin In Oil Drain Bolt
Loosen the oil drain bolt by turning it in the counterclockwise direction with the 17mm socket and a 3/8" drive ratchet.

Be very careful when you remove the oil drain bolt. The old oil might still be hot enough to burn your fingers depending on how long you warmed up the engine.

Allow the old oil to drain out for at least a few minutes or until the flow slows down to just an occasional drip.

Inspect the old washer or "gasket" on the oil drain bolt for any damage or wear.

To help prevent oil leaks, I highly recommend changing the drain bolt washer at every oil change.

The OEM oil drain bolt washer part number is Mazda 9956-41-400 (also known as 995641400 or 9956 41 400).

Clean off the drain hole with a paper towel. Make sure the old washer is not still attached to the oil pan.

Spin in the oil drain bolt (with a new washer) a few turns by hand in the clockwise direction to help prevent it from becoming cross threaded.

Tighten Oil Drain Bolt
Lisle Oil Filter Wrench
Loosen Counterclockwise
Tighten the oil drain bolt by turning it in the clockwise direction with the 17mm socket and a 3/8" drive ratchet until it is snug.

If you have a very reliable and sensitive torque wrench, the CX-5 and Mazda6 service manual specification for tightening the oil drain bolt is a range of 22 to 30 lb-ft (or 30 to 41 N-m).

Avoid over tightening the oil drain bolt to prevent from damaging the threads or cracking the aluminum oil pan.

Carefully move the used oil catch basin to just below the old oil filter.

I highly recommend picking up a Lisle 63600 oil filter wrench. It makes removing stubborn and over tightened oil filters extremely easy.

If you have the oil filter wrench, attach it to a short 3/8" drive extension bar and the ratchet.

Loosen the old oil filter by turning it in the counterclockwise direction.

Carefully spin off the old filter and allow the old oil to drain out for at least a few minutes.

Dip Finger In New Oil
Lubricate Rubber O-Ring
Spin On New Oil Filter
Dip your finger into some new oil and lightly lubricate the rubber o-ring gasket on the new filter.

Lubricating the o-ring on the new filter will help it form a better seal, prevent oil leaks and also make it easier to remove during the next oil change.

Make sure the o-ring gasket from the old filter is not still attached to the engine.

Clean off the oil filter receptacle with a paper towel.

Twist on the new oil filter in the clockwise direction until it is snug or about 1/2 to 3/4 of a turn past finger tight.

Try to avoid over tightening the new filter to prevent from damaging the o-ring gasket which could result in an oil leak.

Reinsert Access Cover
Slide Forward - Front Lip
Push In Pop Rivets
Double check that the drain bolt and the new oil filter are tight before moving on to the next steps.

Reinsert the access cover back into the under engine cover.

Push in the two pop rivets to hold it in place. Make sure the pins in the center are in the fully pushed in and locked position.

Spin In Two Screws
Turn Clockwise
Tighten Two Screws
Spin in the two screws a few turns with your fingers.

Then tighten them in the clockwise direction with the 8mm socket and a 1/4" drive ratchet until they are snug.

Access Panel Secured
Lower SUV From Stands
Insert Automotive Funnel
Carefully lower the SUV from the jack stands by using the floor jack.

Insert the automotive funnel into the oil fill hole.

Pour In New Oil
Tighten Oil Filler Cap
Push Down Oil Dipstick
Please double check your owner's manual for the correct oil capacity and oil type for your vehicle.

For this 2019 CX-5 with the Skyactiv-G 2.5L naturally aspirated I4 engine, the total oil capacity for an oil change with a filter change is 4.8 U.S. quarts (or 4.5L).

Since it is much better to have slightly less oil than necessary in an engine than to run an engine that has been overfilled with oil, I recommend only pouring in about 4.25 to 4.5 U.S. quarts of new SAE 0W-20 oil in at first.

Running an engine that has been overfilled with oil may cause damage to seals, gaskets or other components.

Replace the oil fill cap by twisting it on in the clockwise direction and push down the dipstick all the way in.

To properly check the oil level, start the engine and let it warm up to normal operating temperature.

Turn off the ignition and allow the new oil to drain down to the pan for at least 5 to 10 minutes.

Check Dipstick Oil Level
Replace Dipstick
Oil Change Complete
Pull out the dipstick, wipe it clean with a paper towel, fully reinsert it and pull it out again to check the oil level.

If necessary, slowly pour in more oil (up to the 4.8 U.S. quarts total capacity) and repeatedly check the oil level on the dipstick until it reaches up to or just below the upper hole in the tip of the dipstick.

The upper hole indicates the "MAX (maximum) or "Full" line. The lower hole indicates the "MIN" (minimum) line.

Once the oil level is correct, replace the dipstick and tighten the oil fill cap until it is snug.

Make sure you record the oil change in your car's service records.

It's also a good idea to check your driveway, garage or parking spot for drops of fresh oil which may indicate a leak from the drain bolt or the new oil filter and check the oil level on the dipstick during the next few days.

To reset the oil life meter on the "Maintenance Monitor" system, follow these steps: 1. Select the "A" icon on the home screen to display the "Applications" screen. 2. Select "Vehicle Status Monitor". 3. Select the "Maintenance" option to display the maintenance list screen. 4. Switch the tab to the "Oil Change" option. 5. Choose the "Reset" option.

If you don't use the "Maintenance Monitor" system, the maximum oil and filter service interval specification on the "Scheduled Maintenance" chart in the owner's manual is every 7,500 miles (12,000 km) or at least once a year (12 months).

Please check out all of my 2017-2022 Mazda CX-5 DIY Repair & Maintenance Guides.

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