Not my intent to point any finger at anyone or anything - just a report on current situation with Mexico refineries. We have been hearing of upgrades for many years - no deaf ears here. As far as which or what countries experience oil disasters we might mention familiar names such as Deepwater Horizon and Exxon Valdez. There was also a huge refinery fire in Texas some years ago. I can't find any others. US oil companies now ship a lot of refined fuel to Mexico and plan to ship more as Mexico allows companies other than Pemex to open stations in Mexico. This was meant to advise any current travelers in Mexico that there could be shortages - don't go below a half tank before fueling up.