Your previous post insinuated manufacturers develop their equipment without regards to fuel standards,
Ask yourself this, do you think Bosch really cares about your fuel quality when they develop the fuel systems? Short answer is no.
Bosch is not concerned about emissions, Euro or EPA, or anything other than building a system to deliver x amount of fuel at y pressure. Naturally there will be some collaboration between engine builders to fine tune the interfaces but by and large, Bosch will TELL manufacturers what fuel standards are required for warranty and adequate performance.
Evidently your little corner of the world did not get the word that Bosch supplied the parameters while Cummins and Dodge both adopted a fuel standard for warranty work BECAUSE of all the problems that substandard fuel has been causing HPCR systems for some 12 years. While you may have gotten lucky with a supplier there are many all around you that weren't. The early failures of HPCR systems were well documented as were the causes, fuel quality was number 1. Solids and water were the downfall, the refineries, suppliers, and transporters had to ALL update and change their processes. This is FUEL QUALITY issues that Bosch had specifically said were BAD. They gave all the buyers a list of fuel standards for water, solids, cetane, etc, for their systems, they TOLD the industry what the standard was going to be or they would not warranty their product. Bosch developed the HPCR system to use Euro quality fuel which US refiners have yet to meet consistently because the delivery infrastructure is pretty much crap in places.
Your original statement is still wrong. OEM's don't build to the lowest common denominator to use what is available for fuel, they DEFINE the standards the industries need to meet.
Bio ha sits own problems that negate its usefulness. It is much worse than ULSD for water retention and its tendency to act like a solvent causes many more problems than it solves. Its only saving grace is the lubricity it supplies. The mandating of using a bio mix is nothing but political pork and protectionism. If it really was that good the industry would demand it, not be forced to use it. The real truth is bio has its problems and until those are solved it will remain a protected niche fuel additive, not a mainstream solution.