Choosing motor oil is not just about buying another canister at a gas station. It depends on the quality and type of lubricant engine life, fuel consumption, ease of starting in cold weather and even environmental class your car. But the market is filled with hundreds of brands, lines and specifications: Mobil 1, Castrol Edge, Liqui Moly, Shell Helix Ultra โ€” how not to get lost in this diversity?

In this article we will look at criteria for choosing the best oil for gasoline and diesel engines, we will compare synthetics, semi-synthetics and mineral water, and also reveal the secrets of deciphering markings SAE 5W-30, API SN and ACEA C3. You'll find out why oil with approval VW 502.00 not suitable for turbine engines requiring VW 504.00, and how to avoid costly repairs due to poor choices.

Synthetic vs semi-synthetic vs mineral water: which is better for your engine

The main separation of oils occurs by basic basis. Performance properties depend on it: oxidation resistance, temperature range, cleaning ability and replacement interval.

Mineral oils (mineral water) is a product of direct distillation of petroleum. They are cheap, but quickly lose their properties under high loads. Today they are used only in old carburetor engines (for example, VAZ 2106 or GAZ 24) or in air-cooled equipment (mopeds, lawn mowers). For modern cars mineral water - taboo.

Semi-synthetic oils is a mixture of a mineral base (60-70%) with synthetic additives (30-40%). The best option for budget foreign cars (for example, Renault Logan, Kia Rio) and domestic cars (Lada Vesta, Granta). They are cheaper than synthetics, but are already able to withstand moderate loads and temperatures up to -25ยฐC.

Synthetic oils - a completely artificial base with a package of additives. They do not thicken in the cold (up to -40ยฐC), retain viscosity longer when overheated and have better cleaning properties. This is the best choice for turbocharged engines (Audi TFSI, BMW N20), hybrids and used cars 150,000 km. However, synthetics require quality fuel - on bad gasoline it quickly degrades.

  • ๐Ÿ”ง Mineral water: only for old cars without a catalyst, replacement interval - 5,000 km.
  • โš™๏ธ Semi-synthetic: universal choice for city driving, interval - 7,000โ€“10,000 km.
  • โšก Synthetic: for modern and forced engines, interval - 10,000โ€“15,000 km (but no more 1 year!).
๐Ÿ“Š What oil do you use in your car?
Mineral
Semi-synthetic
Synthetic
I don't know what's in there

Explanation of markings: SAE, API, ACEA and manufacturer approvals

On the oil canister you will see a set of letters and numbers like SAE 5W-40 API SN/CF ACEA A3/B4. What do they mean?

SAE (Society of Automotive Engineers) โ€” classification by viscosity. First number with letter W (Winter) indicates low temperature properties:

  • ๐ŸŒก๏ธ 0W - up to -35ยฐC (for Siberia and the Far North).
  • โ„๏ธ 5W - up to -30ยฐC (most regions of Russia).
  • ๐Ÿ™๏ธ 10W - up to -25ยฐC (for southern regions).

Second digit - high temperature viscosity (the higher, the thicker the oil when heated). For example, 40 suitable for hot climates or sporty riding, and 30 - for moderate mode.

API (American Petroleum Institute) - American quality classification. Categories relevant for gasoline engines SN, SP (newest), for diesel engines - CK-4, FA-4. If it is indicated on the canister SN/CF, the oil is suitable for petrol and diesel engines.

ACEA (European Automobile Manufacturers Association) - European standard. The letters are important here:

  • ๐Ÿ…ฐ๏ธ A/B - for gasoline and diesel passenger cars.
  • ๐Ÿ…ฒ๏ธ C - for engines with a catalyst and particulate filter (for example, Volkswagen TDI).
  • ๐Ÿš› E - for trucks.

Manufacturer approvals These are the internal specifications of automakers. For example:

  • ๐Ÿ”ฐ VW 502.00 - for gasoline engines Volkswagen without turbine.
  • ๐Ÿ”ฅ MB 229.5 โ€” for turbocharged Mercedes-Benz.
  • โšก BMW LL-04 - for engines with a system Valvetronic.
โš ๏ธ Attention: If the car's instructions indicate oil with approval Ford WSS-M2C913-D, filling products without this marking is a risk guarantee and engine life. For example, Ford EcoBoost requires low sulfated ash oil (Low SAPS), otherwise the turbine will quickly fail.
Marking Decoding For which cars
SAE 0W-20 API SP New generation ultra-fluid oil Toyota Corolla 2020+, Honda Jazz (fuel saving)
SAE 5W-30 ACEA C3 Low ash oil for turbo engines Audi A4 2.0 TFSI, BMW 320d (with particulate filter)
SAE 10W-40 API SN/CF Universal oil for gasoline/diesel Lada Largus, Renault Duster (budget option)
SAE 5W-40 VW 504.00 Oil for turbocharged engines with extended drain interval Volkswagen Golf GTI, Skoda Octavia RS
๐Ÿ’ก

Before purchasing oil, check its authenticity using the QR code on the canister. Counterfeits are often found in popular brands (Mobil, Castrol, Shell).

Top 5 best motor oils in 2026: reliability rating

We analyzed reviews from car owners, laboratory test results (Oil Club, ADAC) and expert assessments to rank the best oils for different types of engines.

1. Liqui Moly Top Tec 4200 5W-30

โœ… Best for turbocharged engines with particulate filter. Compliant ACEA C3, API SP and has approvals VW 504.00, MB 229.51. Different stable viscosity at extreme temperatures and low fumes. Ideal for Audi, BMW, Volkswagen.

2. Mobil 1 ESP 5W-30

โœ… The optimal choice for modern diesel engines with the system AdBlue. Suitable for Mercedes OM654, Peugeot BlueHDi. Has approvals MB 229.52, Renault RN0720. Feature - increased oxidation resistance at long replacement intervals (up to 30,000 km in Europe, but in Russia we recommend reducing to 15,000 km).

3. Castrol Edge Professional LL IV 5W-30

โœ… The best oil for BMW and Mini Cooper with permission BMW LL-04. Used in dealership centers for maintenance. Possesses unique technology Titanium FST, which reduces wear by 30% (according to the manufacturer). Suitable for motors with Valvetronic and TwinPower Turbo.

4. Shell Helix Ultra ECT C3 5W-30

โœ… Universal oil for city driving. Developed in collaboration with Ferrari, has approvals Porsche A40, Ford WSS-M2C913-D. Different low friction coefficient, which saves fuel up to 2%. Suitable for Ford EcoBoost, Hyundai/Kia GDI.

5. Motul 8100 X-clean+ 5W-30

โœ… Best price/quality ratio for used cars 100,000+ km. Has approvals Renault RN0710, PSA B71 2312. Feature - high content of detergent additives, which remove deposits in old engines without the risk of clogging the oil passages.

โš ๏ธ Attention: If your engine eats butter (consumption more 500 ml per 1,000 km), do not pour too liquid varieties (0W-20, 5W-20). Optimal choice - 5W-40 or 10W-40 with high temperature viscosity. Otherwise you risk getting oil starvation at high speeds.

Study the manufacturer's recommendations in the service book|Check the tolerances on the canister with the requirements of the car|Check the production date (shelf life - 3โ€“5 years)|Buy oil from an official dealer or trusted seller-->

How to choose oil based on mileage and age of the car

Engine aging dictates its own rules for selecting oil. What is ideal for a new engine can kill used car.

New cars (mileage up to 100,000 km):

Here the priority is compliance with manufacturer's tolerances. For example, for Toyota Camry 2.5 (2020) will do Toyota Genuine Motor Oil 0W-20 with permission API SP. The main thing is don't experiment with viscosity: if the factory recommends 5W-30, don't pour 0W-20 to save fuel.

Cars with average mileage (100,000โ€“200,000 km):

In this range it starts wear of piston rings and valve stem seals. The optimal choice is oils with increased viscosity at operating temperature (5W-40, 10W-40) and a package of additives against fumes. For example, Liqui Moly Hochleistungs 10W-40 or Castrol Magnatec 10W-40 R.

Cars with high mileage (200,000+ km):

Here you need oils with high base number (TBN) and enhanced cleaning properties. They compensate coking of oil channels and reduce the risk occurrence of rings. Best options:

  • ๐Ÿ›ข๏ธ Mobil Super 3000 X1 10W-40 - for engines with high oil consumption.
  • ๐Ÿ”ง Valvoline MaxLife 10W-40 โ€” contains additives to restore the elasticity of oil seals.
  • โš™๏ธ Lukoil Genesis Armortech 10W-40 โ€” a budget option for domestic cars.
What is Base Number (TBN) and why is it important?

The Total Base Number shows how many acidic compounds the oil can neutralize before losing its properties. In new engines, TBN 8โ€“10 is sufficient, but for cars with mileage >200,000 km, you need oil with TBN 12+. Otherwise, acids (fuel combustion products) will begin to corrode the metal, accelerating wear.

For old diesels (for example, Mercedes OM617 or Volvo D24) it is important to choose oils with a class API CF-4 or ACEA B4. They contain dispersants, which prevent the formation soot deposits.

Seasonality of oil: summer, winter and all-season options

In Russia only relevant all-season oils (for example, 5W-30, 10W-40), but in some cases it is worth considering specialized products.

Winter oils (0W, 5W):

If you live in a region where temperatures drop below -30ยฐC (Yakutia, Magadan), it makes sense to fill 0W-20 or 0W-30. They guarantee easy start no load on the starter. However, in summer such oil may be excessively liquid, which will increase waste consumption.

Summer oils (20W-50, 15W-40):

Relevant for southern regions (Krasnodar region, Rostov region) or for sports cars, where the engine operates under high loads. For example, Subaru WRX STI or Nissan GT-R require oils with viscosity 40 or 50 at 100ยฐCto protect the turbine and pistons from overheating.

All-season oils:

The best choice for 90% car owners. Modern oils (5W-30, 5W-40) remain stable in the range from -30ยฐC up to +40ยฐC. However, if you are driving gas (gas), you should choose oil with increased thermal-oxidative stability (for example, Liqui Moly Optimal HT 5W-40).

โš ๏ธ Attention: If you are using oil with viscosity 0W-20 or 5W-20 in a car not intended for it (for example, poured into VAZ 2114 instead of 10W-40), you risk colliding with oil starvation at high speeds. In hot weather, this oil becomes too liquid and the pressure in the system drops.

Common mistakes when choosing oil and their consequences

Even experienced car owners sometimes make mistakes. Let's look at the most dangerous misconceptions:

1. โ€œThe more expensive the oil, the betterโ€

Price does not always equal quality. For example, Mobil 1 ESP 5W-30 costs more Liqui Moly Top Tec 4200, but for BMW N47 fits worse due to lack of clearance BMW LL-04. Always check compliance with specifications, and don't look at the price tag.

2. โ€œYou can mix oils from different brands.โ€

Mixing is allowed only in in case of emergency (for example, on the highway), if the oils have same basis and tolerances. For example, you can add Castrol 5W-40 API SN in Shell 5W-40 API SN, but you can't mix 5W-30 and 10W-40 - this will lead to coagulation additives and the formation of sediment.

3. "The oil change interval can be extended if it is synthetic"

Even the best synthetics lose their properties after 10,000โ€“15,000 km (or 1 year). In Russian conditions (bad fuel, dusty roads, traffic jams) oil ages faster. For example, in Moscow Taxi oil change every 7,000 km regardless of type.

4. "The oil is black - it's time to change it"

Darkening of the oil is normal process, indicating the operation of detergent additives. It is much worse if the oil remains light after 5,000 km - this means that it doesn't wash the engine.

5. "You can fill in oil with a higher API class"

Not always. For example, oil API SP (2020) maybe too aggressive for old motor (VAZ 2109), where required API SJ. The high base number (TBN) in modern oils can corrode old seals.

๐Ÿ’ก

If you bought a used car and donโ€™t know what kind of oil is in it, do engine flushing before replacement. Use Liqui Moly Pro-Line Motorspulung or Wynn's Engine Flush (10 minute wash).

๐Ÿ”น Is it possible to pour diesel oil into a gasoline engine?

It is possible if the oil has universal admission (for example, API SN/CF or ACEA A3/B4). However pure diesel oil (for example, API CK-4) pour into a gasoline engine it's impossible - it contains too many ash additives that will clog the catalyst.

๐Ÿ”น Which oil is better for a turbocharged engine?

For turbo engines (Audi 1.8 TFSI, BMW N20) you need oil with the following tolerances:

  • VW 504.00 / 507.00 (for Volkswagen Group),
  • MB 229.5 (for Mercedes),
  • BMW LL-04 (for BMW with the system Valvetronic).

Optimal viscosity - 5W-30 or 5W-40 with markings Full SAPS (low ash).

๐Ÿ”น Do you need to flush the engine when changing the oil?

Flushing is necessary in three cases:

  1. You do not know what kind of oil was filled previously.
  2. Switch from mineral water to synthetic water (or vice versa).
  3. The engine is very dirty (for example, after purchasing a used car).

For rinsing use short flushing oils (Liqui Moly Pro-Line), and not โ€œfive-minuteโ€ ones, which aggressively wash away deposits and can clog oil channels.

๐Ÿ”น Why did the engine start to eat oil after the change?

Reasons for increased oil consumption after replacement:

  • The oil is too thin (for example, 5W-20 instead of 5W-40).
  • An oil with a low base number (TBN < 8) is used.
  • Worn oil seals or piston rings (repair required).
  • Counterfeit oil (check the canister for authenticity).

If the flow exceeds 1 l per 1,000 km, necessary engine diagnostics.

๐Ÿ”น How often should I change the oil if I donโ€™t drive much?

Even if you drive less 5,000 km per year, oil needs to be changed once every 12 months. Over time, it oxidizes, loses additives and accumulates moisture (condensation). This is especially critical for cars with turbine or direct injection (for example, Mazda Skyactiv).