You're right half the time? You are either a weather man in San Diego, or you look out the window!
Back on track,
I have already started to stock up on Howes Diesel treat. It works.
I used to use Powerservice in the white bottle, but after gelling up with the recommeded dose, adding an entire quart of the stuff, sitting in a garage with electric heater up to 75F for 36 hours it still gelled up two new fuel filters when brought out over night.
Added a 3x dose of Howes - back in the garage - worked like a champ.
My OPINION - Powerservice = no good for USLD.
Howes Diesel treat = Good for USLD
YMMV
jb