ForestGrump
Silver Member
Diesel is a wet fuel, it has water in it, period. That’s why you have that little bowl to empty. Pour point reducer reduces the pour point of the fuel, what the original poster was after. Cetane improver raises your cetane. Cetane improver does not lower your pur point. If you have a yellow sweet fuel and it is gelling it is a paraffin based diesel fuel and your cetane should be just fine. If you buy your diesel from a reputable dealer the ASTM specs shpuld be followed. If your diesel fuel is dark and stinks it has been refined from a low gravity asphatenic crude via coking to which cetane improvers have been added.