<SUBMISSION>
<ACCESSION-NUMBER>0001507615-17-000092
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20170823
<FILING-DATE>20170825
<DATE-OF-FILING-DATE-CHANGE>20170825
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Sterin Steven
<CIK>0001340482
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-35143
<FILM-NUMBER>171051343
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>19100 RIDGEWOOD PARKWAY
<CITY>SAN ANTONIO
<STATE>TX
<ZIP>78259
</MAIL-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>ANDEAVOR LOGISTICS LP
<CIK>0001507615
<ASSIGNED-SIC>4610
<IRS-NUMBER>274151603
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>19100 RIDGEWOOD PARKWAY
<CITY>SAN ANTONIO
<STATE>TX
<ZIP>78259
<PHONE>210-626-6000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>19100 RIDGEWOOD PARKWAY
<CITY>SAN ANTONIO
<STATE>TX
<ZIP>78259
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>TESORO LOGISTICS LP
<DATE-CHANGED>20101210
</FORMER-COMPANY>
</ISSUER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_150368095072250.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
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<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

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    <periodOfReport>2017-08-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001507615</issuerCik>
        <issuerName>ANDEAVOR LOGISTICS LP</issuerName>
        <issuerTradingSymbol>ANDX</issuerTradingSymbol>
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        <reportingOwnerId>
            <rptOwnerCik>0001340482</rptOwnerCik>
            <rptOwnerName>Sterin Steven</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
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            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN ANTONO</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>78259</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CFO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>900</value>
                </transactionShares>
                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
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                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
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        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Carrie P. Ryan, Attorney-in-Fact for Steven M Sterin</signatureName>
        <signatureDate>2017-08-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
