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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Diyjml3oVmd1dPWPlL6U9UHK5H1sgxbmYKchAtVudWkivD7eoHeXum4AiYgnG2pR
 +vsWN82qwHENqKr2lEB9SA==

<SEC-DOCUMENT>0001179110-03-006870.txt : 20030904
<SEC-HEADER>0001179110-03-006870.hdr.sgml : 20030904
<ACCEPTANCE-DATETIME>20030904140001
ACCESSION NUMBER:		0001179110-03-006870
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030904
FILED AS OF DATE:		20030904

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PACIFIC ENERGY PARTNERS LP
		CENTRAL INDEX KEY:			0001168397
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		IRS NUMBER:				680490580

	MAIL ADDRESS:	
		STREET 1:		5900 CHERRY AVE
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90805 4405

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TYWONIUK GERALD A
		CENTRAL INDEX KEY:			0001232481

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31345
		FILM NUMBER:		03881084

	MAIL ADDRESS:	
		STREET 1:		5900 CHERRY AVENUE
		CITY:			LONG BEACH
		STATE:			CA
		ZIP:			90805-4408
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
<periodOfReport>2003-09-04</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0001168397</issuerCik>
        <issuerName>PACIFIC ENERGY PARTNERS LP</issuerName>
        <issuerTradingSymbol>PPX</issuerTradingSymbol>
</issuer>
<reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001232481</rptOwnerCik>
            <rptOwnerName>TYWONIUK GERALD A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5900 CHERRY AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LONG BEACH</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90805</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector>
<isOfficer>1</isOfficer>
<isTenPercentOwner>0</isTenPercentOwner>
<isOther>0</isOther>
<officerTitle>Sr. V.P., CFO &amp; Treasurer </officerTitle>
<otherText></otherText>
</reportingOwnerRelationship>
</reportingOwner>
<nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Units Representing Limited Partner Interests</value>
</securityTitle>
<transactionDate><value>2003-09-04</value>
</transactionDate>
<transactionCoding><transactionFormType>4</transactionFormType>
<transactionCode>P</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionAmounts><transactionShares><value>500</value>
</transactionShares>
<transactionPricePerShare><value>24.36</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode><value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>17500</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
</nonDerivativeTable>
<derivativeTable></derivativeTable>
<footnotes></footnotes>
<remarks>Referencing 5. "Relationship of Reporting Person(s) to Issuer" - All titles shown for Mr. Tywoniuk are with Pacific Energy GP, Inc., general partner of the Issuer.</remarks>
<ownerSignature><signatureName>Gerald A. Tywoniuk</signatureName>
<signatureDate>2003-09-04</signatureDate>
</ownerSignature>
</ownershipDocument>

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