All of the pumps down here with the exception of like 5 have LSD and not ULSD yet. Sticker on the pump indicates what the fuel is and its obvious by looking at it when it comes out of the nozzle. When i run ULSD in my truck i can tell. There is a significant drop in MPG. I guess it depends on what part of the country you are in. Pumps down here that sell ULSD are generally 10-20 cents a gallon higer than the others.

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