This is a question. Please respect it as such.
There seems to be quite a number of gas stations and fuel depots in the USA where ULSD is not sold. I do not know the percentage and I do not know where except in the gulf states, and middle between the great lakes and the gulf of mexico regular diesel dispensers were reportedly "not rare".
I've not read the Ford or any other ULSD warranty or provisos. If the non ULSD facts are correct and an owner shows up at a dealership with a check engine light issue, what then?
I Googled the ULSD versus regular diesel issue and got nothing but conflicting accounts. So the USA may not be a ULSD Virgin either.
An owner may not use any or enough urea product which would cause problems.
None of the above involves Mexican diesel. So this leaves me with raised eyebrows. Again, this is a question, not a statement.
