ACEA is an association of European automobile manufacturers.
The first letters of the ACEA standard indicate the class of vehicles for which the oil brand is intended.
A/B – oils for gasoline and diesel engines (before 2004 A – auto oils for gasoline engines, B – for diesel engines).
C – a class of oils for gasoline and diesel engines that meet Euro-4 environmental standards. Such oils may be used together with catalysts and particulate filters which reduce the level of pollutants in exhaust gases.
E – oils, designed for powerful diesel engines.
The number after the letter characterizes the oil subclass, and the last two digits after the hyphen indicate the time of adoption of the specification.