-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 n3Sq19pPO91uFBNnyzxDPw==

<SEC-DOCUMENT>0001015039-03-000006.txt : 20030610
<SEC-HEADER>0001015039-03-000006.hdr.sgml : 20030610
<ACCEPTANCE-DATETIME>20030610135949
ACCESSION NUMBER:		0001015039-03-000006
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030606
FILED AS OF DATE:		20030610

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LUBRIZOL CORP
		CENTRAL INDEX KEY:			0000060751
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL ORGANIC CHEMICALS [2860]
		IRS NUMBER:				340367600
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		29400 LAKELAND BLVD
		CITY:			WICKLIFFE
		STATE:			OH
		ZIP:			44092
		BUSINESS PHONE:		2169434200

	MAIL ADDRESS:	
		STREET 1:		29400 LAKELAND BLVD
		CITY:			WICKLIFFE
		STATE:			OH
		ZIP:			44092

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LEIB GREGORY P
		CENTRAL INDEX KEY:			0001015039

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-05263
		FILM NUMBER:		03738792

	BUSINESS ADDRESS:	
		STREET 1:		29400 LAKELAND BLVD
		CITY:			WICKLIFFE
		STATE:			OH
		ZIP:			44092
		BUSINESS PHONE:		2169434200

	MAIL ADDRESS:	
		STREET 1:		29400 LAKELAND BLVD
		CITY:			WICKLIFFE
		STATE:			OH
		ZIP:			44092
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <documentType>4</documentType>

    <periodOfReport>2003-06-06</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000060751</issuerCik>
        <issuerName>LUBRIZOL CORP</issuerName>
        <issuerTradingSymbol>LZ</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001015039</rptOwnerCik>
            <rptOwnerName>LEIB GREGORY P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Controller-Commercial Analyst</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeSecurity>
        <securityTitle>
            <value>Common Shares</value>
        </securityTitle>
        <transactionDate>
            <value>2003-06-06</value>
        </transactionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>A</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
        </transactionCoding>
        <transactionTimeliness>
            <value></value>
        </transactionTimeliness>
        <transactionAmounts>
            <transactionShares>
                <value>19.0449</value>
            </transactionShares>
            <transactionValue>
                <value>31.35</value>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>A</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <postTransactionAmounts>
            <sharesOwnedFollowingTransaction>
                <value>4849.5504</value>
                <footnoteId id="F1"/>
            </sharesOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </nonDerivativeSecurity>

    <footnotes>
        <footnote id="F1">Reflects acquisitions pursuant to a dividend reinvestment plan exempt under Rule 16a-11.  End of period holdings include 3,402.7335 common shares held indirectly through a trust, the amount of which reflects acquisitions pursuant to a qualified plan, which are exempt under Section 16b-3(c).</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/Gregory P. Lieb by Andrea A. Zwegat</signatureName>
        <signatureDate>2003-06-10</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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