-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 Osl3gCkzINN20jnLn0CtzfkBh4GWsbGwFkWTXkl4OfR+BNY7aTr8ufToUkIdKusx
 OvMZ5B6hUW1KQ5fx1R7bsA==

<SEC-DOCUMENT>0001140361-03-004583.txt : 20031201
<SEC-HEADER>0001140361-03-004583.hdr.sgml : 20031201
<ACCEPTANCE-DATETIME>20031201180311
ACCESSION NUMBER:		0001140361-03-004583
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031126
FILED AS OF DATE:		20031201

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MILNER GRAHAM P
		CENTRAL INDEX KEY:			0001191646

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-06936
		FILM NUMBER:		031030899

	BUSINESS ADDRESS:	
		STREET 1:		228 WINTERHAWK LANE
		CITY:			ENCINITAS
		STATE:			CA
		ZIP:			92024

	MAIL ADDRESS:	
		STREET 1:		228 WINTERHAWK LANE
		CITY:			ENCINITAS
		STATE:			CA
		ZIP:			92024

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WD 40 CO
		CENTRAL INDEX KEY:			0000105132
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS CHEMICAL PRODUCTS [2890]
		IRS NUMBER:				951797918
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0831

	BUSINESS ADDRESS:	
		STREET 1:		1061 CUDAHY PL
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92110
		BUSINESS PHONE:		6192751400

	MAIL ADDRESS:	
		STREET 1:		1061 CUDAHY PLACE
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92110
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
<periodOfReport>2003-11-26</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000105132</issuerCik>
        <issuerName>WD 40 CO</issuerName>
        <issuerTradingSymbol>WDFC</issuerTradingSymbol>
</issuer>
<reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001191646</rptOwnerCik>
            <rptOwnerName>MILNER GRAHAM P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>228 WINTERHAWK LANE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ENCINITAS</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92024</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector>
<isOfficer>1</isOfficer>
<isTenPercentOwner>0</isTenPercentOwner>
<isOther>0</isOther>
<officerTitle>Executive Vice President</officerTitle>
<otherText></otherText>
</reportingOwnerRelationship>
</reportingOwner>
<nonDerivativeTable>
<nonDerivativeTransaction>
<securityTitle>
<value>Non Qualified Stock Option</value>
</securityTitle>
<transactionDate>
<value>2003-11-25</value>
</transactionDate>
<deemedExecutionDate>
<value>2003-11-26</value>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>14610</value>
</transactionShares>
<transactionPricePerShare>
<value>18.084</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
<footnoteId id="F1"/>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>20107</value>
<footnoteId id="F2"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction>
<securityTitle>
<value>Non Qualified Stock Option</value>
</securityTitle>
<transactionDate>
<value>2003-11-25</value>
</transactionDate>
<deemedExecutionDate>
<value>2003-11-26</value>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>S</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>14610</value>
</transactionShares>
<transactionPricePerShare>
<value>35</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
<footnoteId id="F1"/>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>5497</value>
<footnoteId id="F2"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeTransaction>
</nonDerivativeTable>
<derivativeTable>
<derivativeTransaction>
<securityTitle>
<value>Non Qualified Stock Option</value>
</securityTitle>
<conversionOrExercisePrice>
<value>18.084</value>
</conversionOrExercisePrice>
<transactionDate>
<value>2003-11-25</value>
</transactionDate>
<deemedExecutionDate>
<value>2003-11-26</value>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
<footnoteId id="F1"/>
</transactionCoding>
<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>14610</value>
</transactionShares>
<transactionPricePerShare>
<value>0.0</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<value>2002-04-27</value>
</exerciseDate>
<expirationDate>
<value>2011-04-27</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>14610</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>82000</value>
<footnoteId id="F3"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</derivativeTransaction>
</derivativeTable>
<footnotes>
<footnote id="F1">Transaction pursuant to trading plan adopted pursuant to Rule 10b5-1 under Securities Exchange Act of 1934.</footnote>
<footnote id="F2">Total includes 1233 shares held in WD-40 Company Profit Sharing Plan (Company Stock Fund) account; estimated number of shares based upon equivalent value of units held.</footnote>
<footnote id="F3">Incentive Stock Option (ISO) 5000 shares exercisable 01/01/97 at $21.188 exp. 09/25/05; ISO 5000 shares exercisable 01/01/98 at $23.00 exp. 09/23/06; ISO 6000 shares exercisable 01/01/00 at $31.75 exp. 09/22/07; ISO 6000 shares exercisable 01/01/01 at $23.063 exp. 09/29/08; Non Qualified Stock Options (NQSO) 10000 shares exercisable 09/28/00 at $23.50 exp. 09/28/09; NQSO 2104 shares exercisable 09/26/01 at $20.813 exp. 09/26/10; ISO 17896 shares exercisable 09/26/01 at $20.813 exp. 09/26/10; NQSO 5181 shares exercisable 09/25/02 at $20.75 exp. 09/25/11; ISO 4819 shares exercisable 09/25/02 at $20.75 exp. 09/25/11; NQSO 10000 shares (3334 exercisable 09/24/03; 3333 exercisable 09/24/04; 3333 exercisable 09/24/05) at $27.56 exp. 09/24/12; NQSO 10000 shares (3334 exercisable 09/23/04; 3333 exercisable 09/23/05; 3333 exercisable 09/23/06) at $29.30 exp. 09/24/13.</footnote>
</footnotes>
<remarks></remarks>
<ownerSignature>
<signatureName>Graham P. Milner</signatureName>
<signatureDate>2003-11-26</signatureDate>
</ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
