The Ka24e Engine Test for Ilsac Gf-3 Part Ii: Valve Train Wear Response to Formulation Variables

Document Number: 982626

Date Published: October 1998

Author(s):
Mark E. Hanna - Lubrizol Corp.
C. E. Eldredge-Lamarca - Lubrizol Corp.
K. D. Blalock - Lubrizol Corp.
Dino W. Righi - Lubrizol Corp.
Salvador Saucedo - Lubrizol Corp.
Stephen H. Roby - Chevron Products Company
A. E. Clough - Lubrizol Corp.
J. Haruna - Lubrizol Intl Labs

Abstract:
The work presented here is the second of two papers investigating the KA24E engine test. The first paper characterized the KA24E engine in terms of the physical and chemical operating environment it presents to lubricants. The authors investigated oil degradation and wear mechanisms, and examined the differences between the KA34E and the sequence VE engine tests. It was shown that while the KA24E does not degrade the lubricant to the extent that occurs in the sequence VE, wear could be a serious problem if oils are poorly formulated.

This second paper examines the wear response of the KA24E to formulation variables. A statistically designed matrix demonstrated that the KA24E is sensitive to levels of secondary zinc dialkyldithiophosphate (ZDP), dispersant and calcium sulfonate detergent. This matrix also showed that the KA24E appears to have good repeatability for well formulated oils and is a reasonable replacement for the wear component of the sequence VE.

File Size: 103K
Product Status: In Stock

See other papers presented at International Fall Fuels and Lubricants Meeting and Exposition, October 1998, San Francisco, CA, USA, Session: Fuel Economy and Wear Performance on Engine Oils (Part 2)

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