It helps to both read the article, and to have facts:
First, note the weasel-words "possible," "proposed," not yet under construction," "could be," and "plans eventually."
Setting that raft of weasel-words aside, note that MMEX could never produce a drop of usable fuel from the proposed Phase I system - there is no combustion application, including fuel, which can use high-sulphur "diesel" (really AGO). The only possible "upstream" use would be as make-up for HOBM, which is a declining niche market at best.
Phase II is a fantasy - MMEX has been unable to fund Phase I, let alone scrape together nearly $1-billion for Phase II, which by design could not produce transportation fuels for the U.S. market - no blending capability is planned, and no RIN credit investment is planned. Rail to Mexico is also a fantasy.