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Base Stock Letter of Conformance Signatories

Last updated: 10 August 2017

Signing the Base Stock Manufacturer’s Letter of Conformance (LoC) implies a commitment by base stock manufacturers and partner groups to the quality assurance guidelines described in Appendix B of the ATIEL Code of Practice for the manufacture of base stocks to be used in engine lubricants for which compliance with ACEA Oil Sequences is to be claimed.  The ATIEL Code of Practice forms part of the European Engine Lubricant Quality Management System (EELQMS).

NOTE: The LoCs listed below are valid until 31 October 2017.

ATIEL confirms that it has registered the declaration of the following entities’ participation in EELQMS:

AVISTA Oil Refining & Trading Deutschland

CEPSA Comercial Petroleo SAU

CHEVRON Products Company

EXCEL Paralubes

EXXONMOBIL Petroleum & Chemical BVBA

JXTG Nippon Oil & Energy Corporation, Wakayama Refinery

LLK International

MOTIVA Enterprises LLC

Neste Oyj & Neste Oil Bahrain W.L.L

PETRONAS Lubricants International SDN BHD

Repsol Lubricantes y Especialidades

SHELL International Ltd

SK Lubricants Co Ltd


TOTAL Raffinage France


The appearance of an entity on this list only means that ATIEL has entered in its register, as of the date of the list, a valid Letter of Conformance of the entity concerned, appearing, on the face of it, to be genuine. ATIEL assumes no responsibility for the implementation by the entities identified above of their obligations, as defined in such Letter of Conformance, or for any damage that a breach thereof may cause to third parties. ATIEL can not be held responsible for any claims resulting from inclusion and non-inclusion of entities in this list. ATIEL also declines any responsibility with regard to the external audit procedure, which belongs to the domain of the relevant auditor.

* Any queries concerning this list should be addressed to the ATIEL office (This email address is being protected from spambots. You need JavaScript enabled to view it. - fax: +32 2 566 91 36).