Coming up empty? The pitch: Pop a pill in the fuel tank and save money. The result: Questionable.

With gas prices creeping back up and everyone trying to find a deal, thousands are seeking answers to all of the fuel woes in a pill.

They're called Miles Per Gallon Caplets or MPG Caps, produced by Altamonte Springs company Fuel Freedom International, which just completed its annual conference Sunday in Orlando. The caplet purportedly increases a vehicle's fuel efficiency while reducing emissions.

But a word of caution: Florida Attorney General Bill McCollum is investigating Fuel Freedom in response to dozens of complaints his office has receivedfrom around the state, the nation and the world.

View the Fuel Freedom International review