What Oil Should You Put in a 2009 BMW 328i?

The correct oil for a 2009 BMW 328i is a high-quality, fully synthetic oil that meets BMW Longlife-01 (LL-01) specification, typically in 5W-30 or 0W-40 viscosity for most climates. This specification is more important than the brand, and using the wrong type can affect engine longevity, performance, and even warranty or goodwill considerations.

Understanding the 2009 BMW 328i and Its Engine

The 2009 BMW 328i (E90/E91/E92/E93 generation) uses the naturally aspirated 3.0-liter inline-six engine (N52 in most markets, N51 in some U.S. SULEV states). This engine was engineered around long-life synthetic oils and specific European performance standards, which is why simply choosing “any 5W-30” is not enough. The oil must meet BMW’s own approval standard to protect the engine under heat, high RPMs, and extended drain intervals.

The Official Oil Specification: BMW Longlife-01

The key requirement is BMW’s Longlife-01 (LL-01) specification. This is a European-style oil standard designed for high-performance engines with extended service intervals.

The following list outlines the core criteria you should look for on the oil bottle label.

• BMW LL-01 approval: The label should explicitly say “BMW Longlife-01” or “BMW LL-01.” Some bottles may list it in a table of approvals.
• Fully synthetic base: The oil should be marketed as “full synthetic” or “100% synthetic,” not semi-synthetic or conventional.
• ACEA rating: Typically ACEA A3/B4 (or compatible) which aligns with BMW engine requirements from this era.
• High temperature stability: LL-01 oils are designed to resist breakdown at sustained high temperatures common to BMW inline-six engines.
• Detergent and anti-wear package: Enhanced additive packages help control deposits on VANOS systems and keep the engine internals cleaner.

If you confirm these criteria on the label, you can be confident the oil is suitable even if it is not sold under a BMW brand name.

Recommended Oil Viscosity Grades

BMW originally recommended several viscosity options depending on climate; the most common and practical choices today remain 5W-30 and 0W-40 for the 2009 328i. Both must still meet LL-01.

Most Common Choices

The following list summarizes the most widely used and compatible viscosities for a 2009 BMW 328i in typical conditions.

• 5W-30 LL-01: The standard everyday choice for moderate climates; offers quick cold starts and strong protection at operating temperature.
• 0W-40 LL-01: Popular alternative that flows even better in very cold environments while providing slightly stronger high-temperature protection.
• 5W-40 LL-01: Sometimes chosen in hotter climates or for harder driving; still needs the LL-01 approval.

In practice, either 5W-30 or 0W-40 with LL-01 approval will be correct for most drivers, so availability and climate are the deciding factors.

Climate-Based Guidance

Climate plays a role in selecting between these approved viscosities, especially if you see extreme temperatures.

The list below shows general climate-based guidelines many independent BMW specialists follow.

1. Cold climates (regularly below freezing): 0W-40 LL-01 is often preferred for its superior cold-flow characteristics.
2. Moderate climates (typical North American/European conditions): 5W-30 LL-01 is usually ideal and widely available.
3. Very hot climates or spirited driving: 0W-40 or 5W-40 LL-01 can provide extra high-temp margin while still meeting BMW’s requirements.

As long as the oil meets BMW LL-01, choosing among these viscosities can be tailored to local weather and your driving style without compromising engine safety.

Examples of Suitable Oils on the Market

Numerous major brands make oils that meet BMW LL-01; the brand is less important than the approval. Still, some products are particularly popular in the BMW community and easy to find.

The following list includes commonly available LL-01-approved oils (availability can vary by region and over time; always check the label).

• BMW TwinPower Turbo 5W-30 (LL-01): The dealer-branded option, engineered to BMW specs; a safe default choice.
• Mobil 1 0W-40 FS (European Car Formula, often LL-01): Widely used in BMWs, long-standing LL-01 approval on many variants.
• Castrol EDGE 0W-40 A3/B4 or 5W-30 LL: Specific versions list BMW LL-01 on the label; Castrol has historically partnered with BMW.
• Liqui Moly Leichtlauf High Tech 5W-40: Certain Liqui Moly lines are LL-01 approved and popular with European car specialists.
• Shell Helix Ultra 5W-40 or Pennzoil Platinum Euro 5W-40: Many “Euro” formulations from Shell/Pennzoil meet LL-01.

Product names and formulas change, so it is essential to verify “BMW LL-01” on the current bottle or official product data sheet rather than relying solely on older online recommendations.

How Much Oil Does the 2009 BMW 328i Need?

Knowing the correct fill quantity is critical to avoid under- or over-filling, especially because many BMWs of this era rely on an electronic oil level sensor rather than a traditional dipstick.

The list below outlines typical oil capacity values for the N52/N51 engines in a 2009 328i.

• Approximate capacity with filter change: About 6.9 quarts (6.5 liters), depending slightly on variant and residual oil.
• Practical filling approach: Add around 6.5 quarts, run the engine briefly, then top up in small increments while checking level.
• Electronic level check: Use the onboard computer or iDrive oil level function (or instrument cluster menu) after the engine reaches operating temperature and is on level ground.

Treat the capacity number as a guideline rather than an exact figure; always confirm via the vehicle’s oil level system to avoid overfilling.

Oil Change Intervals: What’s Recommended vs. What’s Wise

BMW’s original service schedule for the 2009 328i was based on long intervals, often around 15,000 miles (24,000 km) or up to two years, guided by the Condition Based Service (CBS) system. Many independent BMW specialists now recommend shorter intervals to preserve these engines.

The following list compares different interval strategies often discussed by technicians and enthusiasts.

1. Factory/CBS interval (~10,000–15,000 miles): Acceptable under warranty-era assumptions, but many consider it aggressive for long-term ownership.
2. Moderate interval (7,500–8,000 miles or ~12,000 km): Common compromise that balances cost and engine health for mixed city/highway driving.
3. Conservative interval (5,000–6,000 miles or ~8,000–10,000 km): Often recommended if you drive short trips, in very hot/cold climates, or want to maximize engine life.

Shorter intervals with quality LL-01 oil are inexpensive insurance against sludge formation, VANOS issues, and premature wear on an aging N52/N51 engine.

Common Mistakes to Avoid

Many owners unknowingly make simple oil-related mistakes that can shorten engine life. Paying attention to labeling and service practices helps prevent expensive problems down the road.

The list below highlights frequent errors and how to avoid them.

• Using non-approved “regular” 5W-30: American-style 5W-30 without LL-01 may shear down or lack the additives BMW engines need.
• Ignoring the LL-01 specification: Even some synthetics are not LL-01; always look for the explicit BMW approval, not just “suitable for European cars.”
• Overfilling the crankcase: Pouring in the full capacity all at once or topping up too aggressively can lead to excess oil and potential leaks or catalytic converter issues.
• Letting oil level run low: The N52 can consume some oil over time; failing to check between changes risks running below the minimum mark.
• Stretching oil changes too long on an older engine: As engines age, contamination increases; long intervals can accelerate wear and sludge buildup.

A careful approach—checking labels, monitoring the level, and respecting realistic intervals—solves most oil-related risks for the 2009 BMW 328i.

How to Verify the Correct Oil for Your Specific Car

While the general guidance is consistent across 2009 328i models, confirming your exact engine and regional recommendations can add certainty.

The following list outlines reliable ways to double-check what your individual vehicle requires.

1. Owner’s manual: The lubrication section lists recommended viscosities and confirms the necessity of BMW LL-01 (or the local equivalent).
2. Under-hood labels: Some cars have a sticker near the engine bay or oil cap indicating viscosity and/or specification.
3. VIN-based dealer lookup: A BMW dealer can pull your car’s build data and provide the official oil specification for your market.
4. BMW technical documentation: Online or printed service manuals often include the same LL-01 requirement and capacity details.

Cross-checking at least one of these sources gives peace of mind that you are following BMW’s intent for your specific 328i configuration.

Summary

For a 2009 BMW 328i, the critical requirement is a fully synthetic engine oil with BMW Longlife-01 (LL-01) approval, typically in 5W-30 or 0W-40 viscosity depending on climate. Aim for about 6.9 quarts (6.5 liters) with filter, confirm the level electronically, and consider changing the oil every 5,000–7,500 miles rather than pushing extended intervals. Brand is secondary to meeting LL-01, but using a reputable “Euro” or BMW-branded oil and respecting proper intervals will significantly improve the long-term health and reliability of your N52/N51 engine.

What kind of oil does a 2009 BMW 328i take?

The recommended oil for a 2009 BMW 328i is a full synthetic with a 5W-30 or 5W-40 viscosity grade, certified to meet the BMW LL-01 specification. However, BMW now often recommends 0W-30 as well, as it offers better flow in cold weather while maintaining the correct viscosity at operating temperatures. Always check your owner’s manual for the specific requirements for your vehicle. 
Key oil recommendations

• Type: Full synthetic is essential for maintaining performance and protecting the engine. 
• Viscosity: 5W-30 is a commonly cited grade, but 5W-40 is also acceptable, especially if it meets the correct certification. Some newer recommendations from BMW might suggest 0W-30 for improved cold-weather performance. 
• Certification: Ensure the oil meets the BMW Longlife-01 (LL-01) specification. 

Example products
Mobil 1 5W-30 Full Synthetic, Castrol 5W-30 Full Synthetic (European Formula), Liqui Moly 5W-30, and Eurol 5W-40 Fully Synthetic.

Can I use any 5W-30 oil in my BMW?

If you look in the manual, it’ll tell you exactly what to use. 0w30, 5w30, 0w40, and 5w40 are perfectly okay. 0w30 and 5w30 are the exact same viscosity at operating temperature.

What oil is good for a BMW 328i?

So, what type of oil is recommended for the BMW 328i? The Pacific BMW service team in Glendale recommends that you use synthetic oil with a grade of 5W-30. We’ve got more information on why this is important in the guide below.

Do I need synthetic engine oil for a 2009 BMW?

With motor oil being the most important fluid next to gasoline in your BMW vehicle, it’s important that you don’t scrimp on the quality or type of motor oil you put in your BMW. That’s why BMW recommends the exclusive use of synthetic motor oils inside all BMW engines.