ACEA* is the abbreviation for Association des Constructeurs Européens d'Automobiles (European Automobile Manufacturers Association) and composed of automobile manufacturers, oil companies, and consumer groups (representative).
(Note) * Association des Constructeurs Européens d'Automobiles = European Automobile Manufacturers Association​

The standards established by the ACEA are more rigorous in test items than the API standards and put emphasis on durability, and also require the high-level of environmental performance such as improving fuel efficiency and reducing harmful substances like exhaust gas.

<Overview of ACEA Standards>
* ACEA A/B = Standard for Gasoline & Diesel Engine Oils
* ACEA C = Standard for Engine Oils with After-Treatment (DPF, TWA)1 (Gasoline & Diesel Engine Oils)
* ACEA E = Standard for Heavy-Duty Diesel Oils
(Note) ¹ DPF: Diesel Particulate Filter
TWA: Three-way Catalyst – Eliminating Co, NOx, and incompletely combusted hydrocarbons​

1. ACEA Standards for Light Duty Engine

2​. ACEA Standards for Heavy Duty Engine

(Note) * SAPS: Sulphated Ash, Phosphorus, Sulphur
         * HTHS: High Temperature / High Shear Rate Viscosity