I buy Premium+ from the local merc dealer from their bulk supply. You know, take my own containers and they fill them up type of deal. Anyway, got two gallon yesterday and when I got home noticed that it looked and smelled different. Took them back and told them I didn't think it was premium+. They told me that they had gotten two new barrels and had noticed themselves that it was different but was indeed premium+. Their best guess was that it had been re-formulated. Does this sound correct or is something going on?? Reputable dealer by the way.