ATC Code of Practice
A Code of Practice devised by the members of the European lubricant additive industry. The Code is intended to aid continuous improvement in the development of engine lubricants and the consistency and validity of performance claims made for them. The Code specifies engine tests, procedures and record keeping.
This Code of Practice has been voluntarily devised by representatives of member companies of the Additive Technical Committee AISBL (ATC). Compliance with the Code is voluntary and is not restricted to ATC members. The Code is intended to encourage both the consistent and precise operation of engine testing and the consistent reporting of results during the performance evaluation of automotive lubricant formulations. It is also intended to generate a body of reference data and knowledge concerning the precision and consistency of operation
of test methods embraced by the Code.
• ACEA European Oil Sequences cover light duty passenger cars & heavy duty trucks.
• The ACEA Oil Sequences are updated regularly to address:
– Changes in European legislation
– Changes in engine technology
– Changes in fuel composition
– The current issue of the Oil Sequences is ACEA 2021
The sequences define the minimum quality level of a product for presentation to ACEA members. Individual member companies may indicate performance parameters other than those covered by the tests shown or more stringent limits.
The ACEA 2016 European Oil Sequences for Service-fill Oils comprise 3 sets (classes) of sequences:
• one for Gasoline and Light Duty Diesel engines;
• one specifically for Gasoline and Light Duty Diesel engines with after treatment devices and
• one for Heavy Duty Diesel engines.
The ACEA Sequences 2021 updates the ACEA sequences 2016 for Light Duty Engines (i.e. point 1 and 2)
The ACEA Sequences 2016 remain valid for Heavy Duty Engines
Within each of these sets, there are categories which reflect different performance requirements –
• three (A3/B4, A5/B5 & A7/B7) for Gasoline and Light Duty Diesel Engines,
• five (C2, C3, C4, C5 & C6) specifically for Engines with After Treatment Devices, and
• four (E4, E6, E7, E9) for Heavy Duty Diesel Engines. The Oil Sequences define the minimum quality level of a product for self-certification to EELQMS and presentation to ACEA members. Individual member companies may indicate performance parameters other than those covered by the tests shown or more stringent limits.