Use a fully synthetic engine oil that meets BMW Longlife-04 specification, typically 0W-30 or 5W-30. Check your owner's manual or the oil cap for the exact grade approved for your engine.
The BMW 4 Series lineup — including the G22 coupe and G23 convertible from 2020 onward — uses turbocharged gasoline and diesel engines with advanced emissions equipment. The Longlife-04 standard ensures compatibility with particulate filters and extended service intervals while protecting modern turbo engines.
Understanding BMW Longlife-04
BMW Longlife-04 is a specification for low-SAPS, synthetic lubricants designed to support long service intervals and reliable cold starts in turbocharged engines and diesels with particulate filters. Oils that meet LL-04 are typically marketed as suitable for the latest BMW engines and are designed to protect emission systems.
What this means for your 4 Series
Most current 4 Series variants require an LL-04 compliant oil. The exact viscosity depends on climate and engine code, but 0W-30, 0W-40, 5W-30, and sometimes 5W-40 are commonly approved. Always confirm by checking the owner's manual or the oil specification on the bottle.
When shopping for oil, look for bottles labeled BMW LL-04 or Longlife-04 and verify the viscosity matches what your manual specifies.
Common LL-04 approved viscosities for the 4 Series include the following. This is a quick guide and not a substitute for the manual.
- 0W-30 synthetic oil meeting BMW LL-04
- 0W-40 synthetic oil meeting BMW LL-04
- 5W-30 synthetic oil meeting BMW LL-04
- 5W-40 synthetic oil meeting BMW LL-04
In practice, 0W-30 and 5W-30 LL-04 are the most widely recommended grades for everyday driving in many markets, with 0W-40 or 5W-40 options favored in hot climates or for higher-performance variants. Always align with the official manual and cap labeling.
Choosing the right viscosity by climate and engine
Viscosity choice depends on engine variant, climate, and driving habits. The following guidelines apply to most BMW 4 Series models equipped with LL-04 oils.
- In moderate climates and for normal daily driving, 0W-30 or 5W-30 LL-04 oils are typical picks.
- In cold climates, 0W-30 helps with cold starts and quick lubrication on startup.
- In high‑performance variants or hot climates, 0W-40 or 5W-40 LL-04 oils may be recommended to sustain protection under higher thermal loads.
- Always confirm the exact grade with your owner's manual or a BMW dealer, and ensure the oil meets the LL-04 spec for your engine code.
Note that some markets or engines may have specific requirements; refer to the cap on the oil reservoir or the official BMW documentation for the exact grade allowed.
Practical buying tips
To avoid missteps when buying oil, follow these general practices:
- Verify the oil carries the BMW Longlife-04 specification (LL-04) on the label.
- Choose the viscosity recommended for your engine and climate (commonly 0W-30 or 5W-30).
- Prefer fully synthetic oils designed for turbocharged engines and with low SAPS if your vehicle has a particulate filter.
- Consider OEM-approved brands or reputable third‑party brands that list LL-04 approval and your region's climate compatibility.
- Adhere to BMW's service intervals and avoid stretching oil changes beyond the recommended period unless your conditions justify it.
If in doubt, consult a certified BMW technician or your local dealer to confirm the exact oil grade for your specific 4 Series model year and engine variant.
Summary
For the BMW 4 Series, choose a fully synthetic oil that meets BMW Longlife-04, with common viscosities of 0W-30 or 5W-30 being typical. The exact grade depends on your engine code, climate, and driving conditions, so always check the owner's manual or the oil cap for the approved specification. When in doubt, consult a BMW service professional to ensure you select the correct oil for your specific 4 Series model.