I believe the Octane sign at your service station is a mistake. It should read cetane.

Maybe I just haven't paid attention, but I don't remember seeing a cetane or any other ratings on a diesel pump in the Southern states. I have always understood that the difference between numbers 1 and 2 has to do with temperature ranges. Because of the mild winters here we only have one number. I know that it freezes at 9 degrees F. Yes it got that cold here once and I looked it up in my owners manual. I was almost stranded on a cold, windy night. Found out later about additives which I now keep in the trunk during the wintertime just in case.

Since I've never seen a cetane rating, I've never known that lower was better. I'm not surprised, however, because almost everything else about a diesel engine is totally backwards from a gas engine. I guess Rudolph just danced to a different drummer.

As you see, you learn something new every day if your reading the postings on this website.

Larry