Changing the oil is one of the most frequent and important procedures in car maintenance. But many drivers forget that along with the oil, filter elements also need to be updated. The health of the engine, fuel consumption and even comfort in the cabin directly depend on their condition. In this article we will look at Which filters must be changed when changing the oil?, and which ones can be updated later - without risk to the car.

Let us warn you right away: saving on filters often results in expensive repairs. For example, a clogged oil filter can cause oil starvation engine, and a worn air compressor leads to increased fuel consumption by 10-15%. We have collected current recommendations for 2026, taking into account the features of modern engines (including turbo and hybrid), and also added a filter compatibility table for popular brands.

1. Oil filter: why is it always changed?

The oil filter is the only filter that is changed at every oil change without exception. Its task is to catch metal shavings, combustion products and other contaminants that form in the engine. If you leave the old filter, the new oil will almost immediately lose its properties.

Modern oil filters come in three types:

  • 🔧 Full-threaded — allow the entire oil flow to pass through (installed on 90% of passenger cars).
  • 🔄 Partial flow — only part of the oil is purified (found in trucks and old diesel engines).
  • 🛡️ Combined - combine both types (used in premium and sports cars, for example, Porsche 911 or BMW M5).

Important: in filters with check valve (installed on most foreign cars) the oil does not flow back into the sump after stopping the engine. This protects against dry start - one of the main reasons for engine wear during cold starts.

⚠️ Attention: If you see dents or traces of oil on the filter housing, it may have already been used! Counterfeits are often sold as "new" but are actually used parts. Check the packaging for protective holograms (for brands Mann, Bosch, Framm).
📊 How often do you change the oil filter?
Every time you change the oil
Every other time
Only when the Check Engine light comes on
I don't know what it is

2. Air filter: when is it definitely time to change it?

The air filter cleans the air entering the engine. A clogged filter leads to:

  • 🔥 Increased fuel consumption (up to +15% on carburetor engines).
  • 🚗 Power drop (especially noticeable on turbocharged motors).
  • 💨 Increased CO₂ emissions (may cause vehicle inspection failure).

Manufacturers recommend changing the air filter every 15–30 thousand km, but the actual period depends on the operating conditions:

Operating conditions Recommended replacement interval
City (moderate dustiness) 25–30 thousand km
Country roads (clean air) 30–40 thousand km
Dusty roads, off-road 10–15 thousand km
Heavy traffic in traffic jams 20 thousand km

Signs that it is time to change the filter:

  • 🔊 Whistling or popping sounds when you press the gas sharply.
  • 📉 Power drop at high speeds.
  • 💨 Visible dust or leaves in the filter housing (upon inspection).
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If you often drive on dusty roads, install zero resistance filter (for example, K&N). It lasts longer and improves dynamics, but requires regular cleaning with a special compound.

3. Fuel filter: why you can’t ignore it

The fuel filter protects the injection system from rust, dirt and water. On modern cars (especially with direct injection, for example, VW TSI or Toyota D-4S) a clogged filter can damage expensive injectors.

Change intervals depend on the type of fuel:

  • ⛽ Gasoline: every 40–60 thousand km (on injection cars, the filter is often built into the fuel pump).
  • ⚡ Diesel: every 20–30 thousand km (due to high sulfur and water content).
  • ⚡ Gas (GPL/CNG): every 10–15 thousand km (gas filters clog faster).

Signs of a clogged fuel filter:

  • 🚗 Jerks during acceleration.
  • 🔥 The engine stalls at idle.
  • 💡 Lights up Check Engine (error code often P0171 or P0174).
⚠️ Attention: On diesel cars (for example, Mercedes OM642 or BMW N47) the fuel filter is often combined with water separator. If it is not drained on time, water will get into the injection system - repairs will cost 100+ thousand rubles.
What happens if you don't change the fuel filter?

Driving for a long time with a clogged filter leads to:

- Overheating and failure of the fuel pump (the price of a new one is from 15 thousand rubles).

- Clogged injectors (ultrasonic cleaning costs 8–12 thousand rubles).

- Increased wear of cylinders due to detonation (engine overhaul - from 200 thousand rubles).

4. Cabin filter: does it affect the oil change?

The cabin filter is not directly connected to the engine, but it is often changed along with the oil - simply because it is convenient. Its task is to clean the air entering the cabin from dust, pollen and harmful gases. A clogged filter leads to:

  • 🤧 Allergies and respiratory tract irritation (especially dangerous for children).
  • 🌫️ Fogging of windows (impairs visibility in the rain).
  • 🚗 Unpleasant odor in the cabin (due to the proliferation of bacteria).

Types of cabin filters:

  • 🍃 Regular (paper) - trap dust and pollen. They cost 300–800 rubles.
  • 🛡️ Coal — additionally absorb harmful gases (for example, exhaust from traffic jams). They cost 1000–2500 rubles.
  • 🦠 Antibacterial - coated with a special composition that kills germs. Relevant for families with children.

Recommended replacement interval - every 15–20 thousand km or once a year. If you often drive on dusty roads or suffer from allergies, change the filter more often.

Make sure you have all the necessary filters (check your VIN numbers)

Prepare tools: oil filter wrench, screwdrivers, gloves

Buy new oil (volume and viscosity must match manufacturer specifications)

Prepare a container for draining used oil (minimum 5 liters)

Check for O-rings (they often come with filters) -->

5. Additional filters: when to check them

In addition to the main ones, there are other filters in the car that sometimes require attention when changing the oil:

Filter type When to check Symptoms of a problem
Automatic transmission filter Every 60–90 thousand km Jerks when shifting gears, dark oil in the box
Power steering filter Every 100 thousand km Heavy steering, noise when turning, dark power steering fluid
Air conditioner filter Once every 2–3 years Poor air flow, unpleasant odor when turning on the air conditioner

These filters are not changed at every oil change, but their condition should be checked every 1–2 years. For example, automatic transmission filter critical for automatic transmissions (especially Toyota, Honda and Nissan with variators). Its clogging is one of the main causes of automatic transmission breakdowns after 150 thousand km.

Filter power steering often forgotten, but its clogging leads to accelerated wear of the power steering pump (the price of a new one is from 20 thousand rubles). Sign of a problem: the fluid in the reservoir turns dark brown.

6. Is it possible to save money on filters?

Many drivers try to save money by not changing filters or buying cheap analogues. Let's look at where this is acceptable and where it is not:

  • ✅ You can save:
  • 🔹 On cabin filter - if it is still clean, you can blow it with compressed air (but no more than 1-2 times).
  • 🔹 On air filter — if the mileage is less than 10 thousand km, and the filter is visually clean, you can leave it.
  • ❌ You can't save:
  • 🔹 On oil filter — it is always changed with oil!
  • 🔹 On fuel filter (especially on diesel engines) - the risk of fuel equipment breakdown is too high.

If you still decide to save money, keep an eye on quality of analogues. Cheap filters (for example, no-name brands from China) can:

  • 🔧 Have poor-quality seals (will lead to oil leaks).
  • 🔄 Use low grade paper (does not retain small particles).
  • 🛡️ Do not withstand pressure (hull rupture under load).
⚠️ Attention: By car with turbocharged (for example, VW 1.8 TSI or Ford EcoBoost) skimping on the air filter leads to dust particles entering the intercooler and turbine. Turbine repair will cost 80–150 thousand rubles.
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Oil and fuel filters are your engine's “insurance.” Saving on them costs many times more than replacing them. Air and cabin filters can be changed less frequently, but do not tighten them beyond the recommended intervals.

7. How to choose the right filters: expert advice

When choosing filters, focus on:

  1. Manufacturer's recommendations — the car manual contains the original part numbers.
  2. VIN compatibility - many online directories (for example, Exist.ru or Autodoc) will select filters automatically.
  3. Reviews and tests — independent research (for example, from ADAC or Behind the Wheel) show the real quality of the filters.

Best filter brands in 2026:

  • 🥇 Mann - leader in quality, often installed on the conveyor (BMW, Mercedes).
  • 🥈 Bosch — optimal price/quality ratio.
  • 🥉 Framm - good for American and Korean cars.
  • 🏆 Mahle - Recommended for turbocharged engines.
  • 💰 K&N — premium filters for tuned cars.

When purchasing, check:

  • 📦 Availability holograms and protective stickers (on original filters).
  • 🔍 Quality sealing gum - it should be soft and elastic.
  • 📏 Compliance sizes (compare with the old filter).

If in doubt about your choice, use cross-catalogs (for example, TECDOC or ETIM), where you can check compatibility by article.

FAQ: Frequently asked questions about replacing filters

Do I need to change the oil filter if the oil is still good?

Yes, the oil filter is always changed along with the oil! Even if the oil looks clean, the filter is already saturated with small particles that are invisible to the eye. If you leave the old filter, the new oil will quickly become dirty.

Is it possible to wash the oil filter instead of replacing it?

No, it's pointless and dangerous. The filter element (usually special paper) loses its properties after washing. In addition, dirt particles remain in the housing, which will immediately enter the new oil.

How often to change filters on gas equipment (GBO)?

Gas filter (if you have methane or propane-butane) change every 10–15 thousand km. This is due to the high content of sulfur and tar in the gas. It is also recommended to clean it once every 2 years. gas injectors.

What happens if you install the wrong size filter?

If the filter is smaller than required, it will not fit tightly and oil will begin to leak past. If it is more, it may jam during installation, which will lead to damage to the thread. Always check catalog compatibility!

Is it worth buying “eternal” oil filters (for example, from K&N)?

Filters with reusable housing (e.g. K&N HP-1002) can be washed and reused. They are suitable for tuned cars, but require regular maintenance. For ordinary machines this is not practical - it is easier to change ordinary filters.