2009–2013 Mazda Mazda6
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| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| Engine oil (5W-20 for most 2009-2013 2.5L; approx. 5.0 US quarts; verify with dipstick) | — | — | |
| Cartridge oil filter element with O-ring kit | — | — | |
| Oil drain plug washer | — | — |
💡 Pro tip: Order all parts at once to save on shipping
Follow these steps carefully
Drive the Mazda6 for 5 to 10 minutes so the oil warms up and drains quickly, then park on a flat surface and engage the parking brake. Pop the hood and remove the oil filler cap so air enters the crankcase and the oil flows out smoothly. A warm drain carries far more suspended contaminants out than a cold one.
Raise the front of the Mazda6 with a floor jack on the front subframe and set jack stands under the reinforced pinch welds, then lower the car onto the stands. Ramps are a convenient option on the Mazda6. Shake the car firmly before sliding underneath to confirm it cannot shift.
The 2009-2013 Mazda6 has a plastic underbody splash shield secured with bolts and clips, so remove the fasteners and drop the shield to expose the drain plug and cartridge filter housing. Keep the hardware in a tray for reassembly. This shield keeps road spray off the filter housing, so it must be reinstalled when the job is done.
Slide a drain pan under the oil drain plug on the oil pan and loosen the plug, finishing the last turns by hand while pressing inward so the oil stream stays controlled. Allow 10 to 15 minutes for the oil to drain to a slow drip. Note that the 2.5L four-cylinder uses a cartridge filter while some early 2009 cars and the V6 use a spin-on, so confirm which one your car has.
On the 2.5L four-cylinder, the cartridge filter housing sits on the engine where the drain pan can catch its oil, so loosen the plastic housing cap with a 76mm 15-flute oil filter wrench. Unscrew the cap slowly, let the trapped oil drain, then pull out the paper element and the old O-ring. Wipe the cap and the housing sealing surface clean with a rag.
Seat the new O-ring from the kit into the groove on the housing cap, coat it lightly with fresh oil, and press the new cartridge element into place. Thread the cap back on by hand first to be sure it starts square, then tighten it with the filter wrench just until snug, since overtightening cracks the plastic cap. Fit a new washer on the drain plug and reinstall the plug firmly but not excessively.
Reinstall the splash shield with its bolts and clips, then lower the Mazda6 back onto level ground. Place a funnel in the filler neck and pour in the correct oil, about 5.0 US quarts for the 2.5L, then reinstall the filler cap. Start the engine for 30 seconds to fill the filter housing, shut it off, wait two minutes, and check the dipstick, topping up until the level reaches the full mark.
Let the engine idle while you look underneath for any drips at the drain plug and filter housing, then shut it off and do a final dipstick check. Record the date and mileage in your maintenance log, since this generation has no electronic oil life monitor to reset. Recycle the used oil and the old filter element at an auto parts store.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
