Oils – viscosity and specifications

Engine oils for Volkswagen, Audi, Škoda, SEAT and CUPRA

The correct engine oil must match the exact engine and manufacturer requirements. “5W-30” or “0W-20” alone is insufficient: the prescribed standard and oil approval matter as well as viscosity.

Requirements for one model can vary by engine, production period and service regime. Select oil using the VIN, exact engine and service documentation.

Viscosity describes resistance to flow. The SAE designation describes behaviour at low and high temperatures:

• The number before W, such as 0W or 5W, is the low-temperature grade relevant to cold starting and pumpability.
• W comes from the English word Winter.
• The number after the hyphen, such as 20, 30 or 40, is the high-temperature viscosity grade.

These numbers are neither ambient-temperature values nor a quality scale. A 5W-40 oil is not automatically more suitable than 0W-20. Engine design and the manufacturer requirement govern.

Standards such as VW 504 00, VW 507 00 and VW 508 00 define oil-performance and application requirements.

Two oils with equal viscosity can have different approvals and need not be interchangeable. General ACEA or API designations do not replace the required VW standard unless the manufacturer expressly permits an alternative for the situation.

Check the exact approval of the product. Vehicle-manufacturer approval differs from an oil producer’s recommendation.

Indicative overview of commonly used standards and viscosity examples

The table gives examples from documented approved products. It is neither a complete viscosity list nor confirmation for every engine. It does not automatically recommend an oil for a particular vehicle.

Older documents may also cite VW 500 00, VW 501 01, VW 503 00 and VW 503 01. Verify any replacement by newer oil for the exact engine.

VW 508 00 and VW 509 00 oils are not universal replacements for older standards. Use them only in engines approved by the manufacturer. A higher standard number does not automatically supersede an earlier specification.

Some older R5 and V10 TDI engines still require VW 506 01. VW 507 00 therefore cannot be recommended for every older TDI without verification.

TSI, TFSI, TDI, GTI, RS or CUPRA alone does not determine the correct oil fill.

Genuine Volkswagen oils include names such as:

LongLife III FE 0W-30

VW 504 00 / VW 507 00

LongLife IV FE 0W-20

VW 508 00 / VW 509 00

Special G

range for applicable older petrol engines; VW 502 00 / VW 505 00

Special D

range for applicable older diesel engines; VW 505 00 / VW 505 01

A trade name identifies a product, but the exact specification and engine application govern. LongLife on the pack does not set the change interval. The vehicle service plan, configured regime and operating or oil-condition requirements govern. LongLife-capable oil does not automatically extend the interval.

Check the level by the procedure specified for the exact vehicle. Oil temperature, vehicle position, time since engine shutdown and other conditions can affect electronic measurement.

Add oil of the prescribed specification gradually and as directed by the manual or vehicle. Do not exceed the permitted level.

Some manuals permit a limited emergency top-up with an alternative when the prescribed oil is unavailable. The quantity and specification apply only to that vehicle and situation, not universally across Group vehicles.

Is the engine-oil level rising during use? Simply extracting the excess may not be enough.

If the oil level was correct after a change or top-up and then rises during subsequent use, the cause must be identified. Particular attention is required if the vehicle asks for the level to be reduced even though no oil has been added in the meantime. Fuel entering the engine oil is one possible cause.

How this may relate to the diesel particulate filter (DPF)

During active DPF regeneration, some diesel engines use additional fuel injection to raise exhaust-gas temperature. Some of this fuel can enter the oil fill.

Frequent short trips, insufficient engine warm-up and repeatedly interrupted regenerations can contribute to fuel accumulating in the oil. The connection should also be investigated if regenerations occur unusually often.

A high-level message alone does not confirm a DPF fault. Fuel dilution of the oil can also occur in petrol engines, for example after repeated short trips.

Why merely reducing the level is not enough

Excessive fuel dilution changes the oil’s properties and can reduce protection for lubricated engine components.

Extracting only the excess corrects the level, but the remaining oil stays diluted. This does not restore its original lubricating properties.

Changing the oil alone does not rectify an underlying fault. The problem can recur unless its cause is identified.

What the driver should do

• Do not add any more oil.
• Contact a workshop without unnecessary delay. State the exact message, when the oil was last changed or topped up, and whether the level rose gradually.
• Base any further driving on the exact vehicle message and its manual; agree the appropriate course of action with the workshop.
• Do not try to address a high level and suspected oil dilution by taking a long drive to “burn off” the DPF or by initiating a forced regeneration yourself without inspection.
• If STOP is displayed, driving is prohibited, or low oil pressure is reported, stop safely, switch off the engine and obtain qualified assistance.

Overfilling and a rising level are different situations

If too much of the correct oil was added during a change or top-up and the fill has not degraded, a workshop may adjust its quantity.

If the level rises during use without further oil being added, the condition cannot automatically be treated as simple overfilling. A workshop must verify the true level, the measurement method and the condition of the oil fill.

For a red low-oil-pressure warning, stop safely and switch off the engine. Do not confuse it with a low-level warning. Low pressure can occur even when enough oil is present. Follow the exact vehicle instruction and obtain qualified assistance.

Assess manual transmissions, DSG, other automatics, transfer cases, differentials and all-wheel-drive clutches separately for their exact construction. Engine-oil standards or similar viscosity do not establish suitability.

To identify the correct oil we need the complete VIN and, where necessary, engine and service-regime details. We verify the prescribed standard, suitable viscosity and fill for the exact vehicle version.