To the all powerful forum I pose this question - How do I know what the cetane rating of a diesel fuel is? I look at the pumps and I do not see it listed like on gasoline pumps. Also, what the hell is a good number to look for anyway? 50? 100? Does grade denomination "diesel 1" or "diesel 2" have anything to do with it? Please advise. Ignorance is uncomfortable.

Thanks!