What the **** is going on

[audioholic 5,000+ posts]

my car gets 123.5 Dbs //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Where does it get it from? And once it has it, what does it do with it? Does it increase gas mileage?