How to Change Your Oil at Home: Complete Step-by-Step Guide

Why Change Your Own Oil?

A synthetic oil change at a quick-lube shop costs $65-90. The same 5-quart jug of full synthetic oil (Mobil 1, Pennzoil Platinum, Castrol Edge) costs $25-35 at Walmart. Add a quality oil filter ($8-15 for Bosch, Wix, or Mobil 1), and the DIY cost is $35-50 -- roughly half the shop price. Beyond the savings, doing it yourself ensures the correct oil type is used, the drain plug is properly torqued (not stripped by an impact gun), and the filter is not overtightened.

What You Need

Tools: Socket wrench with the correct socket for your drain plug (typically 14-17 mm), oil filter wrench (pliers-style or cap-type), drain pan (8+ quart capacity), funnel, jack and jack stands or ramps, wheel chocks, nitrile gloves, safety glasses, work light.

Supplies: Correct oil type and quantity (check owner's manual or oil cap), correct oil filter, new drain plug crush washer (if applicable -- many vehicles use a single-use aluminum or copper washer).

Oil selection: Use the viscosity and specification printed on your oil fill cap, in the owner's manual, or on the under-hood emission label. The most common specifications for modern vehicles are API SP and ILSAC GF-6. Using the wrong viscosity can cause increased engine wear and, on some modern engines with variable valve timing, can trigger check engine lights. On many European vehicles (BMW, Mercedes, VW/Audi), manufacturer-specific approvals (BMW Longlife-01, MB 229.5, VW 502.00) are required.

Step 1: Warm the Engine (But Not Hot)

Start the engine and let it run for 3-5 minutes. Warm oil flows faster and carries more contaminants out of the engine than cold oil. However, do not drain oil from a fully hot engine -- exhaust components at several hundred degrees cause severe burns on contact. Let the engine cool for 10-15 minutes after warming so the oil is warm but not scalding.

Step 2: Lift and Secure the Vehicle

Most vehicles require lifting to access the drain plug. Drive the front wheels onto ramps ($40-60) or lift with a floor jack and support with jack stands. If using ramps, set the parking brake and chock the rear wheels. If using jack stands, follow the correct lift points (pinch weld, front subframe, or center jack point -- check your owner's manual). Never lift by the oil pan, radiator support, or floor pan.

Step 3: Drain the Old Oil

Position the drain pan under the drain plug, accounting for the fact that oil will arc forward as it exits -- the initial stream can overshoot the pan by several inches. Remove the drain plug with a socket, turning counterclockwise. Once it is loose, unscrew it by hand for the last few threads, then pull it away quickly so you do not drop it into the drain pan.

Allow the oil to drain completely -- this takes 5-10 minutes until the stream reduces to a slow drip. While the oil drains, inspect the drain plug. The crush washer (a thin aluminum or copper ring) should be replaced at every oil change. A new washer costs $0.25-1 and prevents the slow leaks that result from reusing a work-hardened washer.

Step 4: Replace the Oil Filter

Position the drain pan under the filter -- it will spill oil when removed. Using an oil filter wrench, loosen the filter (counterclockwise). Once it is loose, spin it off by hand. Expect oil to run down your arm; this is normal.

Before installing the new filter, wipe the filter mounting surface on the engine block clean with a rag. Apply a thin film of clean oil to the rubber gasket on the new filter -- this prevents the gasket from binding and tearing during installation. Hand-tighten the filter to the specification printed on the filter itself or on the filter box. Typically this is 3/4 to 1 full turn after the gasket contacts the mounting surface. Do not use a wrench to tighten -- hand-tight is correct. An overtightened filter is difficult to remove and can tear the gasket.

Step 5: Reinstall the Drain Plug and Torque to Specification

Reinstall the drain plug with the new crush washer. Thread it in by hand to avoid cross-threading, then tighten with a torque wrench set to the proper specification. Drain plug torque specs vary by vehicle but typically range from 25-35 ft-lbs (34-47 Nm). Look up the exact specification for your vehicle -- do not guess. Stripped oil pan threads require either an oversized self-tapping plug (a temporary fix) or replacement of the oil pan ($300-800 in labor).

Step 6: Add New Oil

Locate the oil fill cap on top of the engine and remove it. Insert a funnel and pour in approximately 1 quart less than the total capacity. For most 4-cylinder engines, total capacity is 4-5 quarts; for V6 and V8 engines, 5-8 quarts. Check the owner's manual for the exact capacity.

After adding the partial fill, start the engine and let it run for 30 seconds. Check under the vehicle for leaks at the drain plug and filter. Shut off the engine and wait 2-3 minutes for oil to drain back into the pan. Check the dipstick and add oil in small increments until the level reaches the upper mark (not above it). Overfilling can cause oil foaming (crankshaft whipping air into the oil), which reduces lubrication and can damage the catalytic converter if oil is drawn into the intake through the PCV system.

Step 7: Dispose of Old Oil Responsibly

Pour the used oil from the drain pan into the empty oil jugs using the funnel. Do not mix used oil with other fluids (antifreeze, brake fluid, gasoline) -- contaminated oil cannot be recycled and incurs hazardous waste disposal fees.

Used oil and filters are accepted free of charge at:

• AutoZone: Accepts up to 5 gallons per customer per day
• Advance Auto Parts: Accepts used oil and filters
• O'Reilly Auto Parts: Accepts used oil and filters
• Walmart Auto Care Centers: Most locations with a service center accept used oil
• Municipal recycling centers: Many cities and counties offer free oil recycling

Never pour used oil on the ground, down a drain, or into the trash. One gallon of used oil can contaminate one million gallons of fresh water.

Conclusion

A DIY oil change takes 30-60 minutes for a first-timer and 20-30 minutes with experience. The key points for a successful oil change: warm the engine, replace the drain plug crush washer, torque the drain plug to specification, hand-tighten the oil filter, and fill to the correct level. Master this job and you have already paid for your basic tool kit.