Ironically, a big part of the problem were the
environmentalists. The mandatory transition to ULSD (Ultra Low
Sulfur Diesel) in 2007 wreaked some havoc with existing diesel
engines particularly in colder climates. The fuel had less
lubricity and less resistance to water (microbe growth, etc)
such that older engine designs were requiring alterations. Other
designs were failing because the solvents were breaking down the
oils internal to the engine too quickly. It was simply easier
for the manufacturers to stop selling diesels in the US. Diesel
fuel outside the US didn’t have the ULSD change. * * item2.1 # #
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