ACEA Oil Sequences vs. API Service Categories
Comparing 2 standards across 12 specifications. 12 key differences identified.
The European Automobile Manufacturers’ Association (ACEA) Oil Sequences establish stringent oil performance specifications tailored to European driving conditions and exhaust aftertreatment devices. Dividing into A/B Sequences (High-SAPS for older passenger cars without particulate filters) and C Sequences (C2, C3, C5, C6 Low/Mid-SAPS for DPF diesel and GPF gasoline particulate filters).
The American Petroleum Institute (API) Service Categories define the chemical additive performance, oxidation resistance, sludge prevention, and wear protection of engine oils. Governing gasoline passenger engines with 'S' Service codes (API SP, SN PLUS, SN) engineered to prevent Low-Speed Pre-Ignition (LSPI), and commercial diesel engines with 'C' Commercial codes (API CK-4, FA-4).
Specification Comparison Table
12 Parameters| Parameter / Spec | ||
|---|---|---|
|
Standardization
|
ACEA Oil Sequences (A/B for standard engines, C for catalyst-compatible, E for heavy-duty commercial diesel) | API 1509 / ASTM D4485 / SAE J183 |
|
SAPS Definition
|
Sulfated Ash, Phosphorus, and Sulfur additives (ZDP anti-wear agents and metallic detergents) | — |
|
ACEA A3/B4 (High SAPS)
|
High performance/stay-in-grade stable oil for high-revving European engines; HTHS ≥ 3.5 mPa·s (BMW LL-01, MB 229.5, VW 502.00) | — |
|
ACEA A5/B5 (High SAPS, Low Friction)
|
Low-viscosity fuel economy oil with HTHS 2.9 to 3.5 mPa·s (Ford WSS-M2C913-D, Volvo) | — |
|
ACEA C3 (Mid SAPS, High HTHS)
|
The European DPF/GPF gold standard: HTHS ≥ 3.5 mPa·s, Sulfated Ash ≤ 0.8% (BMW LL-04, MB 229.51/229.52, VW 504.00/507.00, Porsche C30) | — |
|
ACEA C5 & C6 (Low SAPS, Low HTHS)
|
Ultra-low viscosity (0W-20) for modern fuel economy: HTHS 2.6 to 2.9 mPa·s with LSPI protection (BMW LL-17 FE+, VW 508.00/509.00) | — |
|
API SP Standard (Gasoline, 2020+)
|
— | Current top-tier gasoline standard: mandatory protection against Low-Speed Pre-Ignition (LSPI) and timing chain wear |
|
API SN PLUS (Gasoline, 2018)
|
— | Interim standard introducing turbocharged direct-injection (TGDI) LSPI mitigation additives |
|
API SN (Gasoline, 2010)
|
— | Standard high-temperature piston deposit protection and turbocharger sludge control (backward compatible to SM, SL) |
|
API CK-4 (Heavy-Duty Diesel, 2016+)
|
— | High-shear diesel oil designed for 2017+ on-highway heavy trucks with DPF and SCR exhaust aftertreatment (backward compatible) |
|
API FA-4 (Fuel Economy Diesel)
|
— | Lower HTHS diesel oil (2.9-3.2 cP) for fuel economy in modern commercial fleets (NOT backward compatible with older diesels) |
|
The API Donut Symbol
|
— | Licensed trademark on oil bottles verifying viscosity, API service level, and Resource Conserving status |