Come home from the gym, eat dinner and get online to do some work ... I find this done to my car sometime between 10:30 and 11:30.
Of course my first thought when I see it is "oh - flour" - but the stuff isnt flour or sugar, its yellowish, with small reflective crystals in it, and has a salty taste to it ... WTF is this stuff?
When i opened the gas cap it felt loose ... and there was a slight powdery residue inside the fuel filler cap ... I'm wondering if I should tow the car up to a shop and have the tank flushed??

Whats weird is I have NO enemies or people I can think of that would do something like this ...