Again, reality completely invalidates these claims - MMEX's unit will be "new" for about the first year of operation, and it will deteriorate rapidly due to critical design flaws.
In the business, refinery units undergo turn-arounds on average of every two years - most have dual or triple units running in parallel to allow operations on alternate streams in the event of a problem - MMEX lacks even this basic capability.
Shell and tube heat exchangers are periodically descaled, and modern best practices implement descaling process components to reduce the turn-around interval. Valve seals and seats are replaced, packing replaced, pumps maintained, and so on. Anyone who has ever worked in a refinery is aware of these processes, the turn-around cycle, PM, and modernization.
Claims that "age" somehow impairs existing systems, and that MMEX has somehow a competitive advantage are completely ludicrous, and laughable.
MMEX has no advantages relative to corrosion control, "material build up," or any other aspect of processing hydrocarbons - in fact, its proposed unit is impaired in these areas. Anyone can obtain the process diagram, and understand that - I've posted it here at least three times.
And especially since old refineries have material build up, less efficiencies, and damage from H2S/CO2 etc. It is as obvious as the efficiency difference between operating a 20 year old car vs a new one. Mmex