With this negative 30 bs diesel doesn't like to stay liquid anymore

How much fuel was in either of your tanks ahead of the refuel?

 

Had he uses any bio diesel in the previous few tanks? (Only takes a minor amount of bio to have residual issues for many tanks). 

 

How were here the vehicles stored the 24 hours before? 

 

What was the fuel level at the time of gelling? 

 

In my young days we used to ride in the back of pick up trucks going down the freeway. On a cold morning you always wanted to sit in the middle, not on the sides because you could feel the warmth coming from the trans and engine warming the truck bed. The sides were always cold. 

 

Where M73M mounts his pump/ filters is the best possible location for warmth. It closer to the exhaust which may help but, is also above a skid plate