Most diesel refineries are on the east coast and will be shut down by October. Someone in the business said a chemical necessary to the process will be gone by then due to “supply chain issues.” I do know that that was one of the things the railroads were going to quit shipping.
Sorry I don’t have more substantial information. I don’t suppose it will be easy to get any sauce for this. If anyone has a relative or someone they know in the business it would be great to get more information.
Diesel or Diesel engine fluid (DEF)
Diesel ''Exhaust'' Fluid