Filed by MPLX LP

Commission File No.: 001-35714

Pursuant to Rule 425 under the

Securities Act of 1933, as amended

Subject Company:

Andeavor Logistics LP

Commission File No.: 001-35143

The following presentation was first made available by MPLX LP on its website, http://ir.mplx.com, and at the RBN Energy Export Conference on May 21, 2019.