🔧 Optima - Engine Oil & Oil Filter Replacement

This service drains old engine oil, replaces the oil filter, and refills with fresh oil to protect your engine from wear. On your Optima, access is from underneath, and there may be a lower splash shield you’ll remove first.

Difficulty Level: Beginner | Estimated Time: 1.0-1.5 hours

Assumption: Oil spec is 0W-20 full synthetic; verify in your owner’s manual cap/label before filling.

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⚠️ Safety & Precautions

• ⚠️ Make sure the car is fully OFF (not in READY) and keep the key fob away from the car so the engine can’t start automatically.
• ⚠️ Support the car with jack stands on solid ground—never rely on a floor jack alone.
• ⚠️ Let the engine cool 15–30 minutes; hot oil can burn skin.
• ⚠️ Wear gloves and safety glasses; oil can irritate skin and eyes.
• ⚠️ Clean spills immediately; oil on the exhaust can smoke.

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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)
• Wheel chocks
• Safety glasses
• Nitrile gloves
• Drain pan (at least 8-quart)
• Funnel
• 17mm socket
• 3/8" drive ratchet
• Torque wrench (10-80 Nm range)
• Oil filter wrench (cup-style)
• 10mm socket
• Phillips screwdriver
• Trim clip removal tool
• Shop rags

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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 level ground, set the parking brake, and place wheel chocks behind the rear wheels.
• Turn the car fully OFF and keep the key fob at least 10 feet away.
• Pop the hood and remove the oil filler cap (helps oil drain faster).
• Raise the front with a floor jack and set it securely on jack stands at the front lift points.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the lower splash shield (if equipped)

• Position your drain pan (at least 8-quart) under the engine area.
• Use a 10mm socket and 3/8" drive ratchet to remove shield bolts.
• Use a Phillips screwdriver and trim clip removal tool to remove plastic clips without breaking them. Trim clip tool = forked pry tool.
• Set the shield and hardware aside in a small pile so nothing gets lost.

Step 2: Drain the engine oil

• Locate the oil pan drain plug at the bottom of the engine.
• Use a 17mm socket and 3/8" drive ratchet to loosen the drain plug.
• Finish unthreading by hand while pushing inward slightly, then pull it away quickly so the oil drops into the pan.
• Let the oil drain for 5–10 minutes.
• Remove the old crush washer from the drain plug and install the new drain plug crush washer.
• Reinstall the drain plug and tighten with a torque wrench (10-80 Nm range): Torque to 39 Nm (29 ft-lbs).

Step 3: Remove the oil filter

• Move the drain pan (at least 8-quart) under the oil filter area (some oil will spill).
• Use an oil filter wrench (cup-style) to loosen the 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 bad leak).
• Wipe the filter mounting surface clean with shop rags.

Step 4: Install the new oil filter

• Put a thin film of fresh oil on the new filter’s rubber gasket using a gloved finger.
• Spin the new filter on by hand until the gasket touches, then tighten an additional 3/4 turn by hand.
• If you use a torque wrench with a filter socket: Torque to 14 Nm (10 ft-lbs).
• Hand-tight is usually safest for beginners.

Step 5: Reinstall the splash shield

• Reinstall the shield using the 10mm socket, Phillips screwdriver, and trim clip removal tool.
• Snug the fasteners—do not over-tighten plastic clips/bolts.

Step 6: Refill with new engine oil

• Lower the car off the jack stands using the floor jack.
• Insert a funnel into the oil fill hole.
• Pour in about 4.5 quarts of 0W-20 full synthetic first.
• Reinstall the oil filler cap.

Step 7: Start, check for leaks, and set the final oil level

• Start the car and let it run 30–60 seconds (watch underneath for leaks).
• Turn the car OFF and wait 5 minutes for oil to drain back to the pan.
• Pull the dipstick, wipe it with shop rags, reinsert fully, then check the level.
• Add oil in small amounts (0.2 quart at a time) using the funnel until it’s at the full mark.

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✅ After Repair

• Recheck the drain plug and filter area for seepage after a short 5–10 minute drive.
• Reset the maintenance reminder if your Optima has one (varies by cluster). If no reminder, skip.
• Dispose of used oil and the old filter at a recycling center/auto parts store—never dump it.

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💰 DIY vs Shop Cost

Shop Cost: $90-$160 (parts + labor)

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

You Save: $55-$90 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.8-1.2 hours.

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🎯 Ready to get started?

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