400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 SAE TECHNICAL PAPER SERIES 2001-01-1991 Oxidation Stability of Automatic Transmission Fluids –A Study by the International Lubricants Standardization and Approval Committee (ILSAC) ATF Subcommittee Hiroko Ohtani, Pierre A. Willermet and Joseph W. Sprys Ford Motor Company James L. Linden and John E. Flaherty General Motors Corporation Tracey E. King DaimlerChrysler Corporation Minoru Kagawa Fuji Heavy Industry Co., Ltd. Mitsumasa Furumoto Honda R&D Co., Ltd.Shin-ichi Iwamoto Mazda Motor Corporation Hideo Kurashina Mitsubishi Motors Corporation Takumaru Sagawa Nissan Motor Co., Ltd. Hiroyuki Arai Toyota Motor Corporation International Spring Fuels & Lubricants Meeting & Exhibition Orlando, Florida May 7-9, 2001Downloaded from SAE International by Univ of Nottingham - Kings Meadow Campus, Monday, August 13, 2018The appearance of this ISSN code at the bottom of this page indicates SAE’s consent that copies of the paper may be made for personal or internal use of specific clients. This consent is given on the condition, however, that the copier pay a $7.00 per article copy fee through the Copyright Clearance Center, Inc. Operations Center, 222 Rosewood Drive, Danvers, MA 01923 for copying beyond that permitted by Sec- tions 107 or 108 of the U.S. Copyright Law. This consent does not extend to other kinds of copying such as copying for general distribution, for advertising or promotional purposes, for creating new collective works, or for resale. SAE routinely stocks printed papers for a period of three years following date of publication. Direct your orders to SAE Customer Sales and Satisfaction Department. Quantity reprint rates can be obtained from the Customer Sales and Satisfaction Department. To request permission to reprint a technical paper or permission to use copyrighted SAE publications in other works, contact the SAE Publications Group. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. ISSN 0148-7191 Copyright 2001 Society of Automotive Engineers, Inc. Positions and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE. The author is solely responsible for the content of the paper. A process is available by which discussions will be printed with the paper if it is published in SAE Transactions. For permission to publish this paper in full or in part, contact the SAE Publications Group. Persons wishing to submit papers to be considered for presentation or publication through SAE should send the manuscript or a 300 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USAAll SAE papers, standards, and selected books are abstracted and indexed in the Global Mobility DatabaseDownloaded from SAE International by Univ of Nottingham - Kings Meadow Campus, Monday, August 13, 20182001-01-1991 Oxidation Stability of Automatic Transmission Fluids –A Study by the International Lubricants Standardization and Approval Committee (ILSAC) ATF Subcommittee ABSTRACT The International Lubricant Standardization and Approval Committee (ILSAC) ATF subcommittee members have compared the two oxidation bench test methods, Aluminum Beaker Oxidation Test (ABOT) and Indiana Stirring Oxidation Stability Test (ISOT), using a number of factory-fill and service-fill ATFs obtained in Japan and in the US. In many cases, the ATFs were more severely oxidized after the ABOT procedure than after the same duration of the ISOT procedure. The relative severity of these two tests was influenced by the composition of the ATFs. The bench test oxidation data were compared with the transmission and the vehicle oxidation test data. INTRODUCTION The oxidation of automatic transmission fluids can cause a variety of problems with vehicle operation. Peroxides and acidic comp