Transactions of Society of Automotive Engineers of Japan
Online ISSN : 1883-0811
Print ISSN : 0287-8321
ISSN-L : 0287-8321
Research Paper
Evaluation of New Antiwear Chemistry in the Sequence IVA by Radionuclide Testing
Kazuo NishimuraMatt D.GieselmanJohn K.PudelskiDaryl Baumgartner
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2010 Volume 41 Issue 2 Pages 437-442

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Abstract
Pressures for improved emissions system performance and increased fuel economy are driving modern engine oil formulations to lower levels of ZDP and lighter viscosity grades. Both trends could lead to increased wear. Therefore, a test was sought to provide precise quantification of the wear performance of modern oils with low levels of ZDP under realistic conditions. The Sequence IVA engine platform (Nissan KA24E) was used in combination with a radionuclide labeling technique called surface layer activation. The work demonstrated how ZDP level and other formulating variables affected wear and identified several highly efficacious new antiwear components.
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© 2010 Society of Automotive Engineers of Japan, Inc.
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