UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of
the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) April 22, 2005

THE LUBRIZOL CORPORATION

Registrant’s telephone number, including area code: (440) 943-4200

Not Applicable

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Table of Contents

Item 2.02. Results of Operations and Financial Condition

The information contained in this Current Report on Form 8-K, including the Exhibit attached hereto, is being furnished and shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Furthermore, the information contained in this Form 8-K shall not be deemed to be incorporated by reference into any registration statement or other document filed pursuant to the Securities Act of 1933, as amended, unless such subsequent filing specifically references this Form 8-K.

A copy of the news release of The Lubrizol Corporation dated April 22, 2005 announcing the Company’s results for the quarter ended March 31, 2005 is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

Earnings as adjusted (Non-GAAP) is a measure of income that differs from net income measured in accordance with generally accepted accounting principles (GAAP). Earnings as adjusted (Non-GAAP) is earnings per our consolidated results, adjusted for exclusion of restructuring charges and the currency forward contract gain. Management believes that both earnings and earnings as adjusted for exclusion of these special charges and credits assist the investor in understanding the results of operations of The Lubrizol Corporation. In addition, management and the Board of Directors of The Lubrizol Corporation evaluate results using the earnings and earnings as adjusted basis.

Item 9.01 Financial Statements and Exhibits

(c) Exhibits. The following exhibit is furnished herewith:

SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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