MPLX LP

To:
MPLX LP
c/o Global Bondholder Services Corporation
65 Broadway, Suite 404
New York, New York 10006
Facsimile: (212) 624-0294
Email: info@gbsc-usa.com
To Confirm: (866) 924-2200 (Toll-Free)
or (212) 925-1630 (Collect)
Attention: Corporation Actions

Ladies and Gentlemen:

           The undersigned acknowledges receipt of your letter, dated August 22, 2019 (the “Letter”).  Capitalized terms used and not defined in this letter shall have the meanings set forth in your letter.

           The undersigned hereby represents and warrants to MPLX LP and its affiliates (“MPLX”) as follows:

           (1)       it is the beneficial owner, or is acting on behalf of a beneficial owner, of the 6.250% Senior Notes due 2022 (CUSIP Nos. U88109 AE0, 88160Q AH6 and 88160Q AL7) issued by Andeavor Logistics LP (f/k/a Tesoro Logistics LP), a Delaware limited partnership (“ANDX”), and Tesoro Logistics Finance Corp., a Delaware corporation (“Finance Corp.,” and, together with ANDX, the “Issuers”), the 3.500% Senior Notes due 2022 (CUSIP No. 03350W AA7) issued by the Issuers, the 6.375% Senior Notes due 2024 (CUSIP No. 88160Q AM5) issued by the Issuers, the 5.250% Senior Notes due 2025 (CUSIP No. 88160Q AN3) issued by the Issuers, the 4.250% Senior Notes due 2027 (CUSIP No. 03350W AC3) issued by the Issuers or the 5.200% Senior Notes due 2047 (CUSIP No. 03350W AB5) issued by the Issuers (collectively, the “Notes”) in the amounts set forth below; and

           (2)       it is, or in the event that the undersigned is acting on behalf of a beneficial owner of Notes, the undersigned has received a written certification from such beneficial owner (dated as of a specific date on or since the close of such beneficial owner’s most recent fiscal year) to the effect that such beneficial owner is (please indicate below): 

a “Qualified Institutional Buyer,” as that term is defined in Rule 144A under the Securities Act; or

a person that is outside of the “United States” and is (i) not a “U.S. Person,” as those terms are defined in Rule 902 under the Securities Act, (ii) not an “EEA Retail Investor” (as defined in the Letter) and (iii) not located in Canada.

           The undersigned understands that it is providing the information contained herein to MPLX solely for purposes of MPLX’s consideration of certain transactions with respect to the Notes.  This letter neither is an offer nor a solicitation of an offer with respect to the Notes nor creates any obligations whatsoever on the part of MPLX to make any offer or on the part of the undersigned to participate if an offer is made.

           The undersigned agrees (1) not to copy or reproduce any part of any materials (except as permitted therein) received in connection with any transaction MPLX may undertake, (2) not to distribute or disclose any part of such materials or any of their contents (except as permitted therein) to anyone other than, if applicable, the aforementioned beneficial owners on whose behalf the undersigned is acting and (3) to notify MPLX if any of the representations the undersigned makes in this letter cease to be correct.

                                                                                            Very truly yours,

Existing Notes CUSIP/ISIN Insert Principal Amount of Existing Notes Owned
6.250% Senior Notes due 2022 U88109AE0, 88160QAH6 and 88160QAL7
3.500% Senior Notes due 2022 03350WAA7
6.375% Senior Notes due 2024 88160QAM5
5.250% Senior Notes due 2025 88160QAN3
4.250% Senior Notes due 2027 03350WAC3
5.200% Senior Notes due 2047 03350WAB5
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