ACEA categories

A/B – Petrol and diesel engine oils.
(A indicates a petrol engine oil and B is for light duty diesel engines)

A1 / B1
Oils intended for use in petrol and diesel car and light commercial
vehicles specifically capable of using low friction, low viscosity oils
with high temperature / high shear characteristics.

A3 / B3
For use in high performance petrol and diesel cars and light commercials
where extended drain intervals are specified by the vehicle manufacturer
and / or for year-round use of low viscosity oils and / or for use in
severe operating conditions as defined by the vehicle manufacturer.

A3 / B4
For use in high performance petrol and direct injection diesel engines.
Also suitable for applications described under B3.

A5 / B5
For use at extended oil change intervals in high performance car and
light commercial petrol and diesel engines designed for low viscosity
oils.