UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP ( ) Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instructions 1(b). 1. Name and Address of Reporting Person Lieb, Gregory P. 29400 Lakeland Boulevard Wickliffe, OH 44092 2. Issuer Name and Ticker or Trading Symbol The Lubrizol Corporation LZ 3. IRS or Social Security Number of Reporting Person (Voluntary) 4. Statement for Month/Year 03/31/01 5. If Amendment, Date of Original (Month/Year) 6. Relationship of Reporting Person(s) to Issuer (Check all applicable) ( ) Director ( ) 10% Owner (X) Officer (give title below) ( ) Other (specify below) Controller-Commercial Analysis and Support 7. Individual or Joint/Group Filing (Check Applicable Line) (X) Form filed by One Reporting Person ( ) Form filed by More than One Reporting Person

Explanation of Responses: (1) Reflects end-of-period holdings resulting from acquisitions pursuant to a qualified plan, which are exempt under Section 16b-3(c). SIGNATURE OF REPORTING PERSON /s/ Gregory P. Lieb by Leslie M. Reynolds DATE April 6, 2001

LUBRIZOL CORP 4