How to Change Engine Oil at Home

Before You Start: Choosing the Right Oil

The first decision is viscosity grade. Polish winters regularly drop to −15°C or colder, which means 0W-30 or 5W-30 full synthetic oils are the most common choices for modern petrol and diesel engines here. A 10W-40 is acceptable for older engines in summer, but struggles in January cold-starts in Warsaw or Kraków.

Check your owner's manual for the OEM-specified viscosity. If the manual lists a proprietary spec such as Volkswagen 504.00/507.00 or BMW Longlife-04, match that spec on the oil container — not just the viscosity number. Using a non-approved oil in a DPF-equipped diesel is the most common mistake that leads to particulate filter damage.

Tools and Consumables

• Socket set (typically 14–19 mm for the drain plug)
• Oil filter wrench (cap type or strap type, depending on filter location)
• Torque wrench capable of 20–40 Nm
• Oil drain pan — minimum 5 L capacity
• Jack and a pair of axle stands rated for your vehicle's weight
• New drain plug washer (aluminium or copper, vehicle-specific)
• Nitrile gloves and rags
• Funnel

Step-by-Step Procedure

1. Warm up the engine. Drive or idle for 3–5 minutes. Warm oil drains significantly faster than cold oil. Shut down and wait 10 minutes — hot oil causes burns.
2. Raise the vehicle safely. On a level, firm surface, engage the handbrake and wheel chocks. Jack under the manufacturer's specified jack point, then lower onto axle stands. Never rely on a jack alone.
3. Remove the filler cap. Opening the oil filler cap on top of the engine before draining allows air in and speeds drainage. Place the cap in your pocket so it doesn't get lost.
4. Position the drain pan and remove the plug. Slide the pan under the sump. The plug is usually at the lowest point of the oil pan. Crack it loose with the socket, then finish unscrewing by hand — be ready for the oil surge when the plug clears the threads.
5. Allow full drainage. Let the oil drain for at least 10 minutes. Tipping the oil slightly by lifting one side of the vehicle on jack stands extracts another 100–200 ml from some sump designs.
6. Replace the oil filter. Position a rag beneath it. Unscrew the old filter — expect a small oil spill. Wipe the seating surface clean, apply a thin film of fresh oil to the new filter's gasket, and thread it on hand-tight plus 3/4 turn. Do not use the wrench to tighten — over-tightening deforms the gasket.
7. Install the drain plug. Fit a new washer. Hand-thread the plug, then torque to spec — consult Autodata or your workshop manual for the exact figure. For most compact and mid-size cars it is 25–35 Nm.
8. Refill with oil. Insert the funnel, pour in approximately 80% of the specified volume, check the dipstick, then add incrementally. Overfilling by even 300 ml can aerate the oil and damage seals.
9. Start and check. The oil pressure warning light should go out within 3–5 seconds. Idle for 2 minutes, then inspect the drain plug and filter from below with a torch for any weeping.
10. Record and reset. Note the mileage and oil specification in a logbook. Reset the service interval reminder if your car has one.

Common Mistakes

Reusing the drain plug washer is the most frequent cause of post-oil-change sump leaks. Aluminium washers deform on first use and will not seal reliably a second time.

Wrong oil amount — always verify with the dipstick, not just by pouring the volume stated in the manual. Different drain depths, residual oil in the filter, and engine orientation affect actual capacity.

Skipping the filter gasket lubrication allows the rubber to stick to the seating surface, making the next removal very difficult and risking tearing the gasket.

Disposal of Used Oil

Store the drained oil in a sealed container — the original bottles work well. Drop it off at any Punkt Selektywnej Zbiórki Odpadów Komunalnych (PSZOK) in your municipality, or at an auto parts shop. Major chains including Inter Cars, Motointegrator, and Castrol-branded collection points accept it free of charge across Poland.