The BMW 328i requires full synthetic engine oil meeting BMW Longlife-01 (LL-01) specification[1]. For most 328i models, use SAE 5W-30 or 0W-30 viscosity. The N52 engine (2007–2013 E90) takes 6.5 liters (6.9 quarts), while the N20 engine (2012–2016 F30) requires 5.25 liters (5.5 quarts)[2][3].
The 328i came with two different engines depending on generation. Your engine type determines exact oil requirements.
| Engine | Years | Chassis | Oil Specification | Viscosity | Capacity |
|---|---|---|---|---|---|
| N52B30 | 2007–2013 | E90/E91/E92 | BMW LL-01 | 5W-30 | 6.5L (6.9 qt) |
| N20B20 | 2012–2016 | F30/F31 | BMW LL-01 | 0W-20 or 5W-30 | 5.0L (5.3 qt) |
Always verify your engine code on the underhood sticker[1][2]
BMW specifies LL-01 (Longlife-01) as the minimum standard for all 328i gasoline engines. This specification ensures the oil meets requirements for both the engine internals and BMW's long-drain service intervals[4].
The naturally-aspirated N52 inline-6 powers most pre-2012 328i models. This engine is known for tight tolerances and requires quality synthetic oil to prevent issues.
During my years maintaining E90s, the N52 responds well to quality 5W-30 oils. Some owners prefer 5W-40 for track use, but stick to 5W-30 for daily driving[5]. The extra viscosity of 5W-40 offers more protection at high temperatures, though it's not required for normal use.
When filling the N52, add 6 liters initially, run the engine for a minute, then check the electronic dipstick. Top off as needed—never exceed the full mark[3]. For more details on this engine, see our guide on what engine the BMW 328i has.
The turbocharged N20 four-cylinder replaced the N52 starting in 2012. BMW initially specified 5W-30 but later switched to 0W-20 for improved fuel economy[1].
The catch with the N20? It's more sensitive to oil quality than the N52. Turbocharger heat demands oils with excellent thermal stability. Cheap conventional oils break down faster under boost pressure, potentially causing premature turbo wear[1].
For tuned or aggressively-driven N20 engines, BimmerWorld recommends stepping up to Red Line 5W-30 or BMW 0W-30 rather than the fuel-economy-focused 0W-20[1]. The thicker oil offers better protection at high loads.
BMW offers two Longlife-01 variants with different characteristics.
| Specification | HTHS Rating | Best For | Notes |
|---|---|---|---|
| LL-01 | ≥3.5 cP | Performance, high loads | Better protection |
| LL-01 FE | ≥3.0 cP | Daily driving, fuel economy | Required under some warranties |
HTHS = High Temperature High Shear viscosity[4]
LL-01 FE (Fuel Economy) has a lower High Temperature High Shear rating, meaning it flows more easily at operating temperature[4]. This improves fuel economy by 1–2% but provides slightly less protection under extreme conditions.
While under warranty, stick with whatever specification your dealer used—typically LL-01 FE for US-market vehicles[4]. Once out of warranty, switching to standard LL-01 or even LL-04 gives better protection with minimal fuel economy impact. Understanding BMW maintenance costs helps plan for regular oil changes.
You don't need to buy dealer oil. Several brands carry official BMW LL-01 approval.
BMW's own branded oil (Part# 83212365946 for 5W-30) works well but costs more than equivalent aftermarket options[8]. What matters is the LL-01 certification printed on the bottle—not the brand name.
Not all synthetic oils meet BMW requirements. Avoid these:
Using non-approved oil can void your powertrain warranty if it causes damage. More practically, BMW's long 10,000-mile oil change interval assumes you're using oil that maintains protective properties that long[2].
BMW recommends oil changes every 7,500 to 15,000 miles depending on driving conditions and the oil condition monitoring system[2].
| Driving Style | Recommended Interval |
|---|---|
| Normal commuting | 10,000 miles |
| Severe (short trips, towing) | 7,500 miles |
| Highway-dominant | Up to 15,000 miles |
Follow the onboard service indicator when equipped[2]
That said, many enthusiasts (myself included) prefer shorter intervals of 5,000–7,500 miles, especially on N20 turbo engines. Oil is cheap compared to engine repairs. For DIY changes, see our guide on what coolant BMW requires—it pairs well with oil service maintenance.
The 328i uses an electronic oil level sensor rather than a traditional dipstick. Here's how to get an accurate reading:
The electronic gauge shows MIN to MAX range. Keep oil between 3/4 and full. Never overfill—excess oil can cause foaming and reduced lubrication[3].
If your 328i consistently shows low oil between changes, check for leaks at the valve cover gasket and oil filter housing gasket—common failure points on both N52 and N20 engines.
Expect to pay different rates depending on where you service your 328i.
| Service Location | Typical Cost | Includes |
|---|---|---|
| BMW Dealer | $150–$250 | OEM oil, filter, inspection |
| Independent Shop | $80–$150 | LL-01 oil, quality filter |
| DIY | $50–$80 | Oil + filter only |
Prices vary by region[2]
DIY oil changes save significant money over dealer service. You'll need approximately $45–60 in oil (two 5-quart jugs for N52, one for N20) plus $15–20 for a quality oil filter[8].
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