So a long while ago I went to a training either Yanmar or FPT, and in that training the discussion of cetane ratings being lower in the northeast game up. There was even a handout...but I long lost it. I have made it a practice since then to use a cetane booster when I treat the tanks for the winter (along with a fuel treatment). I tried to find an article or any info to that case online today but couldn’t find anything. Am I wrong? Have things changed? I would just like to have something in hand if a customer asks.