One of the most important aspects of maintenance is keeping up with oil changes and understanding the correct engine oil capacity for your BMW 325i.
In this guide, we’ll cover everything you need to know about the BMW 325i engine oil capacity across different model years, the importance of using the right oil, and a look at some of the best engine oils available.
BMW 325i Engine Oil Capacity
The BMW 325i engine oil capacity varies by generation, with older E30 models (1985–1993) holding about 4.5 liters (4.7 quarts), the E36 (1992–1999) around 5.5 liters (5.8 quarts), and newer E46 (1999–2006) and E90 (2006–2011) models requiring approximately 6.5 liters (6.9 quarts) of oil; most modern 325i versions use about 6.5 liters (6.9 quarts) of fully synthetic 5W-30 or 5W-40 oil that meets BMW LL-01 specifications.
Most modern 325i models (E46 and beyond) will require about 6.5 liters (6.9 quarts) of engine oil. Always double-check your owner’s manual for precise specifications, as they may differ slightly depending on the exact year and engine type.
| Model Year Range | BMW 325i Generation | Engine Oil Capacity (Liters) | Engine Oil Capacity (Quarts) |
|---|---|---|---|
| 1985 – 1993 | E30 | 4.2 – 4.5 L | 4.4 – 4.7 qt |
| 1992 – 1999 | E36 | 5.5 L | 5.8 qt |
| 1999 – 2006 | E46 | 6.5 L | 6.9 qt |
| 2006 – 2011 | E90/E91/E92 | 6.5 L | 6.9 qt |
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Best Engine Oils for BMW 325i
1. Castrol EDGE Advanced Full Synthetic 5W-30
Castrol EDGE is one of the most trusted oils for BMW engines and is often recommended by mechanics. It features Fluid TITANIUM Technology, which reduces metal-to-metal contact and enhances performance under pressure. This oil is designed to meet BMW LL-01 specifications, making it an excellent match for the 325i.
- Provides superior wear protection.
- Maintains stability at high temperatures.
- Helps maximize engine performance.
2. Mobil 1 Extended Performance 5W-30 Full Synthetic Motor Oil
Mobil 1 is a world-renowned brand, and its Extended Performance 5W-30 is ideal for BMW owners who want long-lasting protection. It’s engineered for engines that require advanced full synthetic oil and supports longer drain intervals, up to 20,000 miles, depending on driving conditions.
- Excellent oxidation and thermal stability.
- Protects against deposits and sludge.
- Optimized for high-performance engines like the BMW 325i.
3. Liqui Moly Leichtlauf High Tech 5W-40
Liqui Moly is a German-engineered oil brand, making it a perfect fit for European cars such as BMW. The Leichtlauf High Tech 5W-40 meets and exceeds BMW’s oil specifications. It’s well-regarded for its ability to provide smooth operation and reduce wear, even under demanding conditions.
- High lubrication reliability in both hot and cold conditions.
- Reduces oil consumption.
- Trusted by many BMW enthusiasts worldwide.
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Why Correct Oil Capacity Matters
Using the correct oil capacity is crucial for the performance and longevity of your BMW’s engine. Too little oil can lead to insufficient lubrication, increased engine wear, and overheating. On the other hand, overfilling the oil can cause excess pressure, leading to leaks, foaming, and even engine damage.
BMW engines are precision-built, and they rely on proper oil levels to function correctly. Always check your oil using the dipstick or electronic oil level sensor after refilling to ensure you’re within the recommended range.
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Recommended Oil Type for BMW 325i
BMW recommends synthetic engine oil for all of its modern vehicles, including the 325i. For most models, 5W-30 or 5W-40 fully synthetic oil that meets BMW LL-01 specifications is recommended. Synthetic oil provides superior protection under high temperatures, maintains viscosity longer, and ensures smoother operation compared to conventional oils.
Tips for Changing Oil in Your BMW 325i
- Warm up the engine – Let the car run for a few minutes to make the oil less viscous for easier draining.
- Use a new oil filter – Always replace the oil filter when performing an oil change to prevent contaminants from circulating.
- Check oil level carefully – After filling, let the engine run for a few minutes, then check the dipstick or sensor to confirm the level is within the recommended range.
- Stick to regular intervals – BMW typically recommends oil changes every 7,500 to 10,000 miles with synthetic oil, but more frequent changes may be better if you drive in severe conditions.
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FAQs
How many litres of oil does a BMW 325i take?
Most BMW 325i models require about 6.5 litres (6.9 quarts) of engine oil. Older E30 versions take closer to 4.5 litres, while AWD variants can need up to 7.6 litres (8 quarts).
How many litres is a BMW 325i engine?
The BMW 325i typically comes with a 2.5-liter or 3.0-liter inline-six engine, depending on the generation. The displacement doesn’t directly equal oil capacity, but most six-cylinder versions require around 6.5 litres of oil.
What engine oil does a BMW 325i take?
The BMW 325i is best paired with fully synthetic engine oil, typically 5W-30 or 5W-40, that meets BMW’s Longlife-01 (LL-01) specifications. This ensures proper lubrication, reduced wear, and long engine life.
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How much oil does a 2004 BMW 325i 2.5 take?
The 2004 BMW 325i (E46 with a 2.5L inline-six) has an oil capacity of 6.5 litres (6.9 quarts), including the oil filter.
How much is an oil change for a 2006 BMW 325i?
An oil change for a 2006 BMW 325i typically costs between $120 and $170 at most repair shops or dealerships, depending on labor rates and oil brand. Doing it yourself can cost significantly less, around $60 to $80, if you purchase the oil and filter separately.
Final words
The BMW 325i engine oil capacity generally ranges from 4.5 liters (4.7 quarts) for older models to about 6.5 liters (6.9 quarts) for modern versions. Using the correct capacity and high-quality synthetic oil is essential to keeping your BMW running smoothly and efficiently.
When choosing the right oil, trusted brands like Castrol EDGE, Mobil 1 Extended Performance, and Liqui Moly Leichtlauf High Tech are excellent options, all of which meet BMW’s requirements for performance and longevity.
