<SEC-DOCUMENT>0001534701-20-000135.txt : 20200820
<SEC-HEADER>0001534701-20-000135.hdr.sgml : 20200820
<ACCEPTANCE-DATETIME>20200820170202
ACCESSION NUMBER:		0001534701-20-000135
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200819
FILED AS OF DATE:		20200820
DATE AS OF CHANGE:		20200820

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LOWE JOHN E
		CENTRAL INDEX KEY:			0001234262

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35349
		FILM NUMBER:		201120714

	MAIL ADDRESS:	
		STREET 1:		600 N DAIRY ASHFORD
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77079

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Phillips 66
		CENTRAL INDEX KEY:			0001534701
		STANDARD INDUSTRIAL CLASSIFICATION:	PETROLEUM REFINING [2911]
		IRS NUMBER:				453779385
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2331 CITYWEST BLVD.
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77042
		BUSINESS PHONE:		281-293-6600

	MAIL ADDRESS:	
		STREET 1:		2331 CITYWEST BLVD.
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77042
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_159795729778718.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-08-19</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001534701</issuerCik>
        <issuerName>Phillips 66</issuerName>
        <issuerTradingSymbol>PSX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001234262</rptOwnerCik>
            <rptOwnerName>LOWE JOHN E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2331 CITYWEST BLVD.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77042</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-08-19</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>61.4483</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>66829.7247</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Includes 26,829.7247 Restricted Stock Units (RSUs) that settle for shares of Phillips 66 common stock on a 1-for-1 basis, including additional units acquired through routine dividend transactions that are exempt under Rule 16a-11. The restrictions on RSUs lapse after the retirement, death or disability of the non-employee director.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Amanda K. Maki, by Power of Attorney</signatureName>
        <signatureDate>2020-08-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
