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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 P7fF+fHc3erl6choQH418RxJfzDItfi3Yy1NHzJ3WthedzIPu/f59PbHXwovQv+u
 0YzevNqtZnZhiZRXKStuuw==

<SEC-DOCUMENT>0001245156-09-000024.txt : 20090205
<SEC-HEADER>0001245156-09-000024.hdr.sgml : 20090205
<ACCEPTANCE-DATETIME>20090205164307
ACCESSION NUMBER:		0001245156-09-000024
CONFORMED SUBMISSION TYPE:	5
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20081231
FILED AS OF DATE:		20090205
DATE AS OF CHANGE:		20090205

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Westfall Lynn D
		CENTRAL INDEX KEY:			0001362932

	FILING VALUES:
		FORM TYPE:		5
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03473
		FILM NUMBER:		09573507

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		2102832697

	MAIL ADDRESS:	
		STREET 1:		300 CONCORD PLAZA
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78216

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TESORO CORP /NEW/
		CENTRAL INDEX KEY:			0000050104
		STANDARD INDUSTRIAL CLASSIFICATION:	PETROLEUM REFINING [2911]
		IRS NUMBER:				950862768
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		300 CONCORD PLAZA DRIVE
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78216-6999
		BUSINESS PHONE:		2108288484

	MAIL ADDRESS:	
		STREET 1:		300 CONCORD PLAZA DRIVE
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78216-6999

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TESORO PETROLEUM CORP /NEW/
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>5
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>5</documentType>

    <periodOfReport>2008-12-31</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <form3HoldingsReported>0</form3HoldingsReported>

    <form4TransactionsReported>0</form4TransactionsReported>

    <issuer>
        <issuerCik>0000050104</issuerCik>
        <issuerName>TESORO CORP /NEW/</issuerName>
        <issuerTradingSymbol>TSO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001362932</rptOwnerCik>
            <rptOwnerName>Westfall Lynn D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>300 CONCORD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN ANTONIO</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>78216</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP, Ext Affairs &amp; Chief Econo</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-02-02</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>5</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>414</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>16.29</value>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>37260</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Reporting person no longer subject to Section 16 as of October 28, 2008.</footnote>
        <footnote id="F2">The Company's Long-Term Executive Incentive Compensation Plan permits grantees to pay their federal income tax liability with shares, reducing the restricted share grant.</footnote>
        <footnote id="F3">Fair Market Value at February 2, 2009.</footnote>
        <footnote id="F4">Balance includes 5,268 shares of restricted stock, 6,288 shares in the Company's Thrift Plan and direct ownership of 25,704 shares.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Charles S Parrish - Attorney-in-Fact for Lynn D Westfall</signatureName>
        <signatureDate>2009-02-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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