BMW Longlife-17 FE+ is a fully synthetic engine oil specification that BMW introduced in 2017 to meet stricter fuel economy standards and emissions requirements. If you’re driving a modern BMW with a four-cylinder or six-cylinder gasoline engine built from 2014 onward, there’s a good chance your engine was designed to run on LL-17.
The specification uses 0W-20 viscosity, which is significantly thinner than the older LL-01 oils that many BMW owners became familiar with over the years.
What makes LL-17 FE+ particularly important is its formulation for engines equipped with Gasoline Particulate Filters (GPF), also called Petrol Particulate Filters (PPF) in some markets. These filters capture soot particles from the exhaust, similar to diesel particulate filters, but they require oil with specific chemical properties to avoid clogging.
The “FE+” designation stands for Fuel Economy Plus, which tells you exactly what BMW prioritized when developing this specification. You’ll find LL-17 FE+ approved for most B-series engines (B46, B48, B58) and some late-production N20 and N26 engines.
Technical Specifications of LL-17 FE+
LL-17 FE+ is a set of chemical and performance requirements built around fuel economy and emissions hardware protection.
Viscosity Grade
LL-17 FE+ calls for SAE 0W-20, which is thin by any standard. The “0W” cold rating guarantees fast lubrication during cold starts, which is when most engine wear occurs. The “20” hot rating keeps viscosity low at operating temperature, which reduces drag between moving parts. Less drag means better fuel economy, which is exactly what EPA and CAFE regulations demand.
HTHS Viscosity
HTHS measures how well an oil maintains its protective film under extreme pressure and heat, specifically at 150°C. ACEA C5, which LL-17 FE+ is based on, requires HTHS between 2.6 and 2.9 cP.
Compare that to older specifications like LL-01 and LL-04, which require minimum HTHS of 3.5 cP or higher. The lower HTHS directly improves fuel economy by reducing internal friction, but it also means the oil has less cushion under severe loads. This is why BMW engineered these specific tolerances into the B-series engines from the ground up rather than trying to retrofit older engine designs.
ACEA C5 specifically demands 2% better fuel economy than the C3 standard, which gives you an idea of how much pressure automakers face to squeeze every tenth of a percent from their fleet averages.
Chemical Composition
LL-17 FE+ uses a mid-SAPS formulation. This reduced ash content is critical for engines equipped with Gasoline Particulate Filters.
When oil burns in the combustion chamber (which happens in any engine, even healthy ones), it leaves behind ash residue. That ash gets trapped in the particulate filter. Too much ash accumulation eventually clogs the filter, which kills exhaust flow and requires expensive replacement. Mid-SAPS oils produce less ash, which extends the filter’s service life and prevents the check engine light scenarios that plague owners who use the wrong oil.
The mid-SAPS designation also keeps LL-17 FE+ compatible with ACEA C5 and potentially C6 specifications, along with API SP, API SQ Resource Conserving, and ILSAC GF-7A standards.
Base Stock Technology
BMW partners with Shell to produce their branded LL-17 FE+ oil, and Shell often uses GTL (gas-to-liquid) synthetic base stock in these formulations. GTL base oils have lower volatility than conventional synthetics, which means they evaporate less at high temperatures. For direct injection engines, this lower volatility helps keep intake valves cleaner and slows carbon buildup.
Oil Change Intervals
LL-17 FE+ is engineered for extended drain intervals, which BMW’s condition-based service system typically calculates at around 10,000 miles under ideal conditions. The iDrive system monitors driving behavior and can shorten this interval to 6,000 to 8,000 miles if you’re doing a lot of short trips, cold starts, or stop-and-go driving where the oil never reaches full operating temperature for extended periods.
Engine Compatibility
LL-17 FE+ is approved for most modern four-cylinder and six-cylinder gasoline engines introduced from 2016 to 2023, including N20, N26, B46A, B46D, B48, B58A, B58C, and B58D engines. It effectively replaced the earlier LL-14 FE+ standard in the US market.
The specification also covers the newer B58TU2 engine, though BMW primarily recommends the even thinner LL-22 FE++ (0W-12) for that application. You can use LL-17 FE+ as an alternative, but the factory fill in 2023 and newer B58N 6-cylinder 48V mild hybrid and B48P 4-cylinder engines is typically the 0W-12 specification.
Recommended Oils
Castrol EDGE Euro Car LL IV FE 0W-20
Castrol EDGE Euro Car LL IV FE 0W-20
Castrol Edge Professional LL IV FE 0W-20 is an approved BMW LL-17 FE+ equivalent that also carries official approvals from Volkswagen, Porsche, and Mercedes-Benz. This is a fully synthetic 0W-20 oil built around Castrol’s Titanium FST (Fluid Strength Technology) additive package, which the company claims doubles film strength to prevent oil breakdown under high shear conditions.
The oil meets ACEA C5 and C6 specifications, which means it uses a mid-SAPS formulation designed for engines with gasoline particulate filters. The sulphated ash content sits at 0.76% by weight, keeping ash accumulation in the GPF manageable over extended drain intervals. At 100°C, the kinematic viscosity measures 8.0 mm²/s, with a viscosity index of 165 that helps maintain stable protection across temperature ranges.
The Cold Cranking Simulator viscosity at -35°C comes in at 4,100 mPa.s, with a pour point of -48°C. This guarantees oil flow during cold starts even in extreme winter conditions. The flash point of 196°C provides good resistance to volatility at high operating temperatures.
Castrol formulated this oil specifically for modern turbocharged engines running tight tolerances and low-viscosity requirements. The ACEA C5 base means it delivers the fuel economy improvements that automakers need to meet CAFE standards while providing adequate film strength under load.
The oil also meets API SQ and ILSAC GF-7 specifications, which are the current North American standards for gasoline engine oils. Castrol warrants it as suitable for BMW Longlife-14 FE+ applications as well, though LL-17 FE+ is the primary specification.
Other manufacturer approvals and compatibilities:
- Volkswagen Group: VW 508 00 / 509 00
- Porsche: C20
- Mercedes-Benz: MB-Approval 229.71 / 229.72
Meets specifications: Chrysler MS-6395, Ford WSS-M2C956-A1
BMW TwinPower Turbo Longlife-17 FE+ 0W-20
BMW SAE 0W-20 Full Synthetic Motor Oil
BMW TwinPower Turbo Longlife-17 FE+ 0W-20 is the OEM-spec oil for modern BMW gasoline engines, manufactured by Shell under BMW’s part number 83-21-2-461-988. This is the oil your dealership uses for warranty service. It is formulated specifically around Shell’s PurePlus technology, which uses gas-to-liquid (GTL) synthetic base stock.
The GTL base provides lower volatility than conventional synthetic oils, which means less evaporation at high temperatures. For direct injection engines, this matters because lower volatility helps reduce carbon buildup on intake valves. The oil meets BMW Longlife-17 FE+ specification along with API SP and ACEA C5 standards, which confirms it uses the mid-SAPS additive package required for engines with gasoline particulate filters.
BMW designed this oil for engines including the B46A, B48, B58, and N20 families found in 2, 3, 4, 5, 7 Series and X and Z series vehicles from 2011 to 2025. The formulation includes detergents and dispersants to prevent sludge formation and maintain engine cleanliness over extended drain intervals.
Castrol Edge Euro Car 0W-20 M
Castrol EDGE Euro Car 0W-20
Castrol Edge Euro Car 0W-20 M is an approved BMW LL-17 FE+ equivalent designed for modern European gasoline, diesel, and hybrid engines. This fully synthetic oil meets ACEA C5 and C6 specifications along with API SP and ILSAC GF-6 standards.
The kinematic viscosity at 100°C measures 8.0 mm²/s, matching the thin profile required for fuel economy-focused applications. The viscosity index of 166 provides stable protection across temperature ranges, while the sulphated ash content of 0.74% by weight keeps particulate filter contamination low over extended service intervals.
Cold-start performance is strong. The Cold Cranking Simulator viscosity at -35°C comes in at 5,822 mPa.s, with a pour point of -45°C. This guarantees fast oil flow during cold starts even in severe winter conditions. The flash point of 201°C provides good resistance to evaporation at high operating temperatures.
The oil works across petrol, diesel, and hybrid applications where manufacturers specify ACEA C5, C6, API SP, ILSAC GF-6, or earlier 0W-20 specifications. Castrol claims the Euro Car range delivers at least 40% better performance across the latest European manufacturer and ACEA oil standards compared to specification limits.
Other manufacturer approvals and compatibilities:
- Mercedes-Benz: MB-Approval 229.71 / 229.72
- Porsche: C20
- Volkswagen Group: VW 508 00 / 509 00
- ACEA: C5, C6
- API: SP
- ILSAC: GF-6
How to Change to BMW Longlife-17 FE+
Switching to BMW Longlife-17 FE+ is a straightforward process, but it is essential to follow the proper steps to ensure optimal results.
Preparation
Before changing the oil, gather all necessary tools and materials, including the correct grade of BMW Longlife-17 FE+, a new oil filter, a wrench, and a drain pan. Make sure the vehicle is on a level surface and the engine is warm to allow for easier oil flow.
Draining the Old Oil
- Place the drain pan under the oil drain plug.
- Use the wrench to remove the drain plug and allow the old oil to drain completely.
- Replace the drain plug securely once all the oil has drained.
Replacing the Oil Filter
- Use the wrench to remove the old oil filter.
- Lubricate the gasket of the new oil filter with a small amount of fresh oil.
- Install the new oil filter by hand, ensuring it is snug but not over-tightened.
Adding BMW Longlife-17 FE+
- Locate the oil filler cap on top of the engine.
- Pour the recommended amount of BMW Longlife-17 FE+ into the engine.
- Replace the oil filler cap and start the engine to allow the new oil to circulate.
- Check the oil level using the dipstick and add more oil if necessary.
Closing Notes
LL-17 FE+ exists because automakers needed to meet stricter CAFE and EPA requirements, and thinner oil was the most practical way to reduce internal friction and improve fuel economy numbers on the test cycle.
What the technical specifications don’t immediately reveal is how oil manufacturers achieve adequate wear protection with such a thin film. The low HTHS requirement between 2.6 and 2.9 cP creates a challenge because there’s less oil cushion between metal surfaces under load. To compensate, formulations meeting LL-17 FE+ typically use significantly higher concentrations of anti-wear additives, particularly organo-molybdenum complexes (commonly called Moly). These friction modifiers are expensive, which is why genuine LL-17 FE+ approved oils cost more than generic 0W-20 products.
Turbocharger bearings present another concern with low-HTHS oils. Journal bearings in turbos rely on a thick oil film for both load-bearing and cooling. Operating at the 2.6 cP lower boundary brings bearing surfaces closer to their fatigue limits under sustained high load and high temperature conditions. While catastrophic failures remain rare because of the anti-wear additives, the potential for minor micro-pitting increases over time, particularly if you frequently drive hard or tow heavy loads.
This is why oil change interval compliance matters more with LL-17 FE+ than it did with older, thicker specifications like LL-01. Use the right specification, change it on schedule, and understand that these thin oils were designed to meet regulatory requirements first and maximize engine life second.
Related Reads
- List of Approved Oils Meeting VW 508 00 Standard Discover top oils that meet the VW 508 00 standard, ensuring compatibility with BMW Longlife-17 FE+ specifications for optimal engine performance – Read more
- List of Approved Oils Meeting VW 502 00 Standard Explore the best oils approved for VW 502 00, comparing them with BMW Longlife-17 FE+ specifications to keep your engine running smoothly – Find out more
- List of Motor Oils with Chrysler MS-6395 Certification Find out which motor oils meet Chrysler MS-6395 certification and their performance compared to BMW Longlife-17 FE+ oils for superior engine protection – Learn more
- List of Motor Oils That Can Meet LL-01 Check out our list of oils that meet BMW LL-01 specifications and how they compare to BMW Longlife-17 FE+ oils for maintaining your engine’s health – Discover more
