freezing point of kerosene?
Kerosene and heating oil have problems at about -50C flowing (personal experience) but the other factor is that often these fuels have water in them. The water freezes and falls to the bottom. Most problems I have had with kerosene were related to ice blocking the sump style drain or the filters in a rotary pump. I really really doubt if any of this applies to you, but I got a bit nostalgic with your post.