It's bound to happen. Rumor Mongers will read news then twist it for every last drop of sensation is extracted.
https://mexiconewsdaily.com/news/moodys-warns-oil-export-strategy-threatens-pemex/ROAD APPLES except for the following...
Pemex will continue to process the same or more crude oil through the Shell/Pemex joint venture refinery at Deer Park, Houston, Texas.
The oil is not exported it is taking advantage of NAFTA agreements about zero import/export regulations and taxes.
This means that ANY price increase at extraneous gasolineras would have to take the form of import duty payable to the Mexican government.
This is just going to get weirder and weirder.
IF IF IF
The prices for comistibles happens I can see marches, blockades, and general strikes in Mexico's future.
It would be a terrible way for AMLO and his MORENA party to start off with.