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Mazda CX-9 Engine Oil Change Guide
How to replace the motor oil and filter in a 2008-2012 Mazda CX-9 with the MZI V6 (Duratec 37) 3.7 liter engine.

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Mazda CX-9 MZI V6
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SAE 5W-20 Oil Cap
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Remove Oil Filler Cap

This automotive "how-to" guide was specifically written to assist owners of the 2008 to 2012 Mazda CX-9 SUV in replacing the motor oil and filter on the MZI V6 (Duratec 37) 3.7L engine.

Owners of other vehicles equipped with the Mazda MZI V6 or Ford Cyclone Duratec 37 engine such as the Mazda6, Ford Edge, Ford Fusion, Mercury Milan, or Lincoln MKZ may also find this guide to be useful.

To complete this oil change procedure, you'll need the following items: 5.5 US quarts of new SAE 5W-20 oil, a new oil filter, a 15mm socket or wrench, a used oil catch container, an automotive funnel, a floor jack and two jack stands.

A few compatible oil filters for the 2008-2012 Mazda CX-9 with their part numbers include the Purolator PL20195 or L20195, Fram PH3600, Bosch D3422, K&N HP-2009, Motorcraft FL400S, and the Mobil1 M1-209.

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Raise Passenger Side
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Oil Pan & Oil Filter
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Oil Drain Bolt
The first step is to warm up the engine for a few minutes to help suspend any contaminants within the old oil and help it flow out more quickly when you remove the oil pan's drain plug. Then switch off the engine, open the hood and remove the oil filler cap on the front left of the engine by turning it counter clockwise.

Raise the passenger side of the car with a floor jack and support it with the two jack stands. Slide beneath the passenger side of the engine and locate the grey oil pan and the silver oil drain bolt. The top of the oil drain bolt points towards the rear of the vehicle and is located right next to an exhaust pipe. The oil filter is located at the opposite side of the oil pan closer to the front of the vehicle.

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Old Oil Filter
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15mm Socket & Wrench
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Remove Oil Drain Bolt
Slide the used oil catch container to just below the oil drain bolt and carefully remove it with a 15mm socket and ratcheting wrench. Try to avoid getting any of the used oil on your skin since it contains carcinogens (cancer causing chemicals) and it could also be hot enough to cause burns.
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Used Oil Catch Container
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Twist Off Old Oil Filter
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Dip Finger In New Oil


 
Allow the old oil to drain out for at least a few minutes before re-inserting the oil drain bolt and tightening it to just past hand tight (about 15-20 ft lbs).

Move the used oil catch container forward to under the oil oil filter and spin it off counter clockwise. If you have trouble removing the old oil filter, use an oil filter wrench. Allow the old oil to drain from the oil filter receptacle for a few minutes.

Before installing the new oil filter, dip your pinky finger into some new 5W-20 oil and run it around the rubber o-ring on the  top of the new oil filter to lubricate it. This will help the new oil filter to form a better seal, prevent oil leaks, and also make it easier to remove the oil filter at the next oil change.

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Lubricate New Oil Filter
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Insert Automotive Funnel
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Twist On New Oil Filter
Twist on the new oil filter by hand and tighten it 1/2 to 3/4 turn past hand tight. Do not use an oil filter wrench to tighten the new oil filter since it could damage it and cause oil leaks.

Double check that the oil drain bolt and new oil filter are both tight before lowering the car from the jack stands and floor jack.

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Tighten Oil Drain Bolt
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Pour In New 5W-20 Oil
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Engine Oil Dipstick
Insert the automotive funnel into the oil filler hole in the engine bay and pour in 5 quarts of the 5.5 U.S. quarts (5.2L or 4.6 Imp. Qt.) needed for an oil change with a new oil filter.

Remove the funnel, replace the oil filler cap, run the engine for a few minutes, shut it off, let it sit for a few minutes, and then check the oil level on the yellow handled engine oil dipstick.

Slowly add the last .5 (1/2) quart while repeatedly checking the level on the dipstick until it reaches to just below the MAX line. When the oil level is correct, re-insert the oil filler cap and tighten it by turning it clockwise.

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Check Oil Level On Dipstick
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Replace Oil Filler Cap
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Remove Jack & Stands
Be sure to check the oil level on the dipstick at least a few times over the next week and watch your driveway for oil spots that may indicate a leak from the oil drain bolt or oil filter. Record the mileage and oil change details in your service record book.

For more, check out my Mazda CX-9 Repair & Maintenance Guides page.
 

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