At least I think it's weird!  Maybe someone can explain it.

Matilda has a gasoline leak.  Dripping from the hose the runs from the gas
tank to the fuel filter.  She's going to my trusty wonderful mechanic on
Tuesday (he's off Sunday and Monday and too busy today) to be repaired, and
CAA will tow her there.  So that's not my question.

I've got a pan under her so the gas doesn't run all over the neighborhood
(more than it already did before I noticed it).  Last night when I first
realized this, it was just gasoline dripping.  This morning I checked again
to see if the pan needed emptying, and the hose is all covered with slightly
cottage-cheesy-looking clumps of white stuff.  Is this some kind of chemical
reaction between gasoline and something?  Road salt?  Humidity?  Some of
them fell into the pan with the gas, most are just hanging off the hose.  I
don't know if they're hard or soft, since I didn't want to stick my fingers
in the gasoline to check.

What is this?

Joy