<SEC-DOCUMENT>0001552000-20-000060-index.html : 20200827
<SEC-HEADER>0001552000-20-000060.hdr.sgml : 20200827
<ACCEPTANCE-DATETIME>20200827162652
ACCESSION NUMBER:		0001552000-20-000060
CONFORMED SUBMISSION TYPE:	S-3ASR
PUBLIC DOCUMENT COUNT:		9
FILED AS OF DATE:		20200827
DATE AS OF CHANGE:		20200827
EFFECTIVENESS DATE:		20200827

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MPLX LP
		CENTRAL INDEX KEY:			0001552000
		STANDARD INDUSTRIAL CLASSIFICATION:	PIPE LINES (NO NATURAL GAS) [4610]
		IRS NUMBER:				270005456
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-3ASR
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-248443
		FILM NUMBER:		201143181

	BUSINESS ADDRESS:	
		STREET 1:		200 E. HARDIN STREET
		CITY:			FINDLAY
		STATE:			OH
		ZIP:			45840
		BUSINESS PHONE:		(419) 421-2159

	MAIL ADDRESS:	
		STREET 1:		200 E. HARDIN STREET
		CITY:			FINDLAY
		STATE:			OH
		ZIP:			45840
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-3ASR
<SEQUENCE>1
<FILENAME>mplxs-3shelfaug2020.htm
<DESCRIPTION>S-3ASR
<TEXT>
Document 1 - file: mplxs-3shelfaug2020.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>ex-512020.htm
<DESCRIPTION>EXHIBIT 5.1
<TEXT>
Document 2 - file: ex-512020.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-8.1
<SEQUENCE>3
<FILENAME>ex-812020.htm
<DESCRIPTION>EXHIBIT 8.1
<TEXT>
Document 3 - file: ex-812020.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>4
<FILENAME>ex-2312020.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
Document 4 - file: ex-2312020.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.1
<SEQUENCE>5
<FILENAME>ex-2412020.htm
<DESCRIPTION>EXHIBIT 24.1
<TEXT>
Document 5 - file: ex-2412020.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-25.1
<SEQUENCE>6
<FILENAME>ex-2512020.htm
<DESCRIPTION>EXHIBIT 25.1
<TEXT>
Document 6 - file: ex-2512020.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-25.2
<SEQUENCE>7
<FILENAME>ex-2522020.htm
<DESCRIPTION>EXHIBIT 25.2
<TEXT>
Document 7 - file: ex-2522020.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>a546864draft82520image1.jpg
<TEXT>
Document 8 - file: a546864draft82520image1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>exhibit5opinionthr_image1a03.gif
<TEXT>
Document 9 - file: exhibit5opinionthr_image1a03.gif

</DOCUMENT>
</SEC-DOCUMENT>