At a glance
Regular maintenance level · mixed driving
When
20,000 km
or 12 months, whichever comes first · 12,400 mi
Cost
≈ €90
≈ €55 if you do it yourself (parts)
EU average, independent workshop, VAT included
DIY difficulty
Moderate3 / 5
You need ramps or a jack and axle stands, a filter wrench and a drain pan. Allow about an hour the first time.
How critical
High4 / 5
5 / 5 Critical on wet-belt engines (PureTech)
Short answer: Change the engine oil and filter every 20,000 km or 12 months, whichever comes first. If you mostly drive in town, make it every 14,000 km. Wet-belt engines such as the PureTech need it every 15,000 km at most. An oil change costs about €90 at an independent workshop (EU average).
Engine oil keeps the engine's moving metal parts from touching. It wears out with heat, time and short trips, even when the level on the dipstick looks fine.
What engine oil does
Oil forms a thin film between the parts that move against each other: the pistons in their cylinders, the crankshaft and camshaft in their bearings, the valves and the timing drive. Without it, metal rubs on metal and the engine is damaged within minutes.
Oil also carries heat away, holds dirt and soot in suspension so they don't settle inside the engine, and helps the piston rings seal. The oil filter catches the particles the oil collects, which is why it's replaced at every oil change.
Why oil wears out
Oil isn't used up like fuel. It gradually loses its ability to protect the engine, for four reasons:
- Heat and time. Oil oxidises and breaks down chemically, even in a car that's rarely driven. That's why there's a time limit as well as a distance limit.
- Short trips. On short journeys the engine never gets fully warm. Condensation and fuel that slips past the piston rings stay in the oil instead of evaporating.
- Fuel and soot. Diesels with a particulate filter inject extra fuel to clean it, and some of it ends up in the oil. In an ADAC test of 30 diesels used mainly for short trips, half had more than 10% fuel in their oil.
- Additives used up. Oil contains additives that fight wear, deposits and acids. They're consumed as the oil works, and topping up doesn't replace them.
When to change it
Change it at whichever comes first: the distance or the time. The distance depends on how you mostly drive and on the maintenance level you choose.
City: Short trips and stop-start traffic. The engine runs for hours while covering few kilometres, and rarely gets hot enough to clear water and fuel from the oil. Intervals are 30% shorter.
| Maintenance level | Distance | Time |
|---|---|---|
| RegularStandard schedule. Lowest cost, more wear over time. | 14,000 km(8,700 mi) | 12 months |
| CarefulMore often than standard. Longer life, moderate cost. | 10,500 km(6,500 mi) | 12 months |
| EnthusiastMost frequent servicing. Top condition, highest cost. | 7,000 km(4,300 mi) | 12 months |
Mixed: A mix of town and open-road driving. These are the standard intervals.
| Maintenance level | Distance | Time |
|---|---|---|
| RegularStandard schedule. Lowest cost, more wear over time. | 20,000 km(12,400 mi) | 12 months |
| CarefulMore often than standard. Longer life, moderate cost. | 15,000 km(9,300 mi) | 12 months |
| EnthusiastMost frequent servicing. Top condition, highest cost. | 10,000 km(6,200 mi) | 12 months |
Highway: Long, steady journeys are the easiest on oil. The interval still never goes beyond the standard one.
| Maintenance level | Distance | Time |
|---|---|---|
| RegularStandard schedule. Lowest cost, more wear over time. | 20,000 km(12,400 mi) | 12 months |
| CarefulMore often than standard. Longer life, moderate cost. | 15,000 km(9,300 mi) | 12 months |
| EnthusiastMost frequent servicing. Top condition, highest cost. | 10,000 km(6,200 mi) | 12 months |
Track2Drive never extends an oil interval beyond the standard one, even for highway driving. The manufacturer's interval stays the limit. You get a reminder 1,500 km or 30 days before the change is due.
PureTech and other wet-belt engines
On most engines, the timing belt runs dry behind a cover. On a wet-belt engine (also called belt-in-oil), it runs inside the engine, bathed in oil. This makes the engine quieter and more efficient, but the belt's life now depends on the condition of the oil.
Wet belts are used in Stellantis 1.0 and 1.2 PureTech petrol engines (Peugeot, Citroën, DS, Opel and Vauxhall), the Ford 1.0 EcoBoost and 2.0 EcoBlue, and Honda's 1.0 VTEC Turbo.
Why it needs more frequent oil changes
Fuel that gets into the oil on short trips and cold starts attacks the belt's rubber, and old or incorrect oil no longer protects it. The problem is most common on cars driven less than 15,000 km a year, mostly in town.
Why it's more serious
A worn wet belt sheds rubber particles. They can block the oil pump's strainer and cut the oil supply to the whole engine. On some cars, belt wear has also reduced the vacuum for the brake servo, which led to a recall in 2021.
Warning signs
- The oil level rises between changes. This usually means fuel or water is getting into the oil. Change it early.
- Milky residue under the filler cap or water droplets on the dipstick. Have the car checked.
- Oil that's thick or sludgy on the dipstick. Colour alone isn't a reliable sign: diesel oil turns black almost immediately.
- Ticking or knocking from the engine, a smell of oil in the cabin, or dark exhaust smoke.
What happens if you don't change it
- Less protection. Bearings, camshaft and cylinder walls wear faster, and fuel consumption goes up.
- Sludge and deposits. Oil passages and the filter clog, so less clean oil reaches the parts that need it.
- Turbo damage. Deposits build up in the turbo's oil supply, causing blue smoke, noise and eventually failure.
- Timing chain or wet belt damage. Chains stretch faster, and wet belts break down and shed debris.
- Engine failure. In the worst case, the engine seizes. A repair or replacement engine costs thousands.
Why not just follow the manual, or wait for the warning light?
Your manual is the right starting point. But many drivers follow the wrong schedule in it, and warning lights mostly report damage, not when a service is due.
- Most manuals have two schedules. One for normal use, and a shorter one for short trips, city traffic, heat or towing. Volkswagen, for example, offers a 15,000 km / 1 year service, and a LongLife service of up to 30,000 km / 2 years only if your driving suits it.
- Most drivers count as "severe" without knowing it. In a survey by the US motoring club AAA, 6% of drivers thought their driving was severe. More than half actually met the definition.
- By the time the red light comes on, it's too late. The oil pressure light comes on when pressure has already been lost, and the engine may already be damaged. It's a signal to stop, not a service reminder.
- The service indicator estimates; it doesn't measure. Most service reminders calculate from distance, temperatures and trip patterns. They don't measure the condition or level of the oil.
How an oil change is done
- Run the engine for a few minutes so the oil drains easily, then park on level ground and switch off.
- Raise the car on ramps or axle stands. Never work under a car supported only by a jack.
- Remove the sump plug and drain the old oil into a pan.
- Replace the oil filter, with a little fresh oil on the new seal.
- Refit the sump plug with a new washer, tightened to the specified torque.
- Fill with the oil your manual specifies. Run the engine briefly, wait a few minutes, then check the dipstick and top up to between the minimum and maximum marks.
- Reset the service indicator and take the old oil and filter to a recycling point.
At a workshop, ask for
- Oil with the approval listed in your manual (for example VW 504 00 or ACEA C3), not just "5W-30"
- A new filter and sump plug washer
- The service indicator reset, and the work and oil approval listed on the invoice
Choosing the right oil
The viscosity (such as 0W-20 or 5W-30) tells you how the oil flows when cold and when hot. The approval matters just as much: cars with a diesel particulate filter need low-ash "C" oils, and the wrong oil can damage the filter or the catalytic converter.
How much an oil change costs
For a typical family car (Golf, Clio or Focus size), the parts (oil and filter) cost about €55 wherever you are, so that's also what you pay if you do it yourself. What changes between countries is the half hour of labour. Figures are estimates for an independent workshop, VAT included.
| Country | Workshop labour rate | Oil change at a workshop |
|---|---|---|
| EU average | €70/h | ≈ €90 |
| Germany | €105/h | ≈ €108 |
| Netherlands | €100/h | ≈ €105 |
| Austria | €95/h | ≈ €103 |
| France | €77.50/h | ≈ €94 |
| Belgium | €69.50/h | ≈ €90 |
| Italy | €65/h | ≈ €88 |
| Spain | €48.50/h | ≈ €79 |
| Poland | €40.50/h | ≈ €75 |
| Portugal | €37/h | ≈ €74 |
Long-life synthetic oils, larger engines and main dealers cost more. Some workshops let you bring your own oil, so ask first.
Questions people ask
Do I need to change the oil if I hardly drive?
Yes, at least once a year. Oil oxidises and absorbs moisture even when the car is parked, and short trips make it worse.
Can I just top up instead of changing the oil?
Topping up restores the level, not the condition. The additives in the old oil are still used up, and the dirt stays in the engine.
Do I have to service at the dealer to keep my warranty?
Not in the EU. Under EU rules, a manufacturer can't make its warranty depend on servicing within its own network, as long as the work follows its schedule and specifications and uses parts and oil of matching quality. Keep the invoices. Warranty repairs and recalls are still carried out by the brand's network. This is general information, not legal advice.
Why is my oil level rising?
Usually because fuel or water is getting into the oil, often from short trips. Change the oil early and mention it to your mechanic.