🔧 MX-5 Miata - Engine Oil & Oil Filter Change

Changing the oil and filter keeps your engine lubricated and helps prevent wear and sludge buildup. On your MX-5 Miata, this is a straightforward job as long as the car is safely supported and you don’t overtighten the drain plug or filter.

Difficulty Level: Beginner | Estimated Time: 0.8-1.5 hours

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⚠️ Safety & Precautions

• 🛑 Never work under a car supported only by a jack—use jack stands.
• 🔥 Engine oil and exhaust parts can be hot; let the car cool 10-15 minutes after warming it up.
• 🧯 Keep oil off the tire/brake area; clean spills immediately.
• 🔋 Battery disconnect is not required for this service.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum, pair)
• Wheel chocks (pair)
• Safety glasses
• Nitrile gloves
• Socket wrench (3/8")
• 10mm socket
• 17mm socket
• Torque wrench (3/8" drive, 10-80 Nm range)
• Trim clip remover tool
• Oil drain pan (at least 6-quart)
• Oil filter wrench (adjustable band type)
• Funnel
• Shop towels

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Engine oil (0W-20 full synthetic) - Qty: 5 quarts
• Oil filter - Qty: 1
• Drain plug crush washer - Qty: 1

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📋 Before You Begin

• 🧭 Park on a level surface, set the parking brake, and place wheel chocks behind the rear tires.
• 🧊 Warm the engine 2-3 minutes, then shut it off and wait 10-15 minutes so oil is warm (drains better) but not dangerously hot.
• 🛠️ A “trim clip remover tool” is a small pry tool that pops plastic fasteners out without breaking them.
• 🧰 Set your oil drain pan and tools within reach before you lift the car.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and support the front of the car

• Place wheel chocks behind the rear tires.
• Use a floor jack to lift the front of the car at the approved front jack point.
• Set the car onto jack stands at the front support points and gently lower the floor jack.
• Give the car a shake test.

Step 2: Remove the front under cover (undertray)

• Put on safety glasses and nitrile gloves.
• Use a 10mm socket and socket wrench to remove the under cover bolts.
• Use a trim clip remover tool to pop out any plastic clips.
• Lower the under cover and set it aside.

Step 3: Drain the engine oil

• Open the hood and remove the oil fill cap (this helps oil drain faster).
• Position the oil drain pan under the oil pan drain plug.
• Use a 17mm socket and socket wrench to loosen the drain plug, then finish by hand.
• Let oil drain until it slows to an occasional drip (usually 5-10 minutes).

Step 4: Reinstall the drain plug with a new crush washer

• Remove the old crush washer from the drain plug and install the new drain plug crush washer.
• Thread the drain plug in by hand first to avoid cross-threading.
• Use a torque wrench with a 17mm socket and Torque to 30-41 Nm (22-30 ft-lbs).
• Wipe the area clean with shop towels.

Step 5: Remove and replace the oil filter

• Move the oil drain pan under the oil filter area (oil will spill when the filter comes off).
• Use an oil filter wrench (adjustable band type) to loosen the old filter, then spin it off by hand.
• Make sure the old rubber gasket didn’t stick to the engine (a stuck gasket can cause a major leak).
• Lightly oil the new filter’s rubber gasket using a dab of new oil.
• Spin the new filter on by hand until the gasket touches, then tighten an additional 3/4 turn by hand.

Step 6: Reinstall the under cover

• Lift the under cover back into place.
• Install plastic clips by hand, then press them in using the trim clip remover tool as needed.
• Use a 10mm socket and socket wrench to reinstall the bolts snugly (do not over-tighten into plastic).

Step 7: Refill with oil

• Place a funnel in the oil fill hole.
• Pour in about 4.0 quarts first, then reinstall the oil fill cap.
• Start the engine and let it idle 30-60 seconds, then shut it off.
• Wait 5 minutes, then check the dipstick and top off as needed (typical fill is about 4.4 quarts (4.2 L) with filter).
• Wipe spills with shop towels.

Step 8: Check for leaks

• With the engine running, look underneath for leaks at the drain plug and oil filter.
• Shut the engine off and recheck the dipstick level after 5 minutes.

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✅ After Repair

• 🧪 Take a short 5-10 minute drive, then recheck for leaks and confirm the oil level is near the top mark on the dipstick.
• 🖥️ Reset the oil maintenance reminder on Mazda Connect: Applications > Vehicle Status Monitor > Maintenance > Oil Change > Reset
• ♻️ Pour used oil into a sealed container and take it (and the old filter) to an oil recycling drop-off.

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💰 DIY vs Shop Cost

Shop Cost: $120-$220 (parts + labor)

DIY Cost: $35-$70 (parts only)

You Save: $85-$150 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.7-1.0 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.