PITTSBURGH —(WPXI)-Sheetz will celebrate the Fourth of July by offering all grades of gas for $1.776 a gallon.This limited-time promotion will begin at 12:01 a.m. on July 4 and will last all day, or while promotional gallons last. The discounted price will apply to regular, E85 (flex fuel), Unleaded 88, mid-grade and premium fuel grades at all of Sheetz locations in Pennsylvania, Maryland, Ohio, North Carolina, Virginia and West Virginia.It will not apply to diesel or Ethanol Free (E0) fuel. The price commemorates the year 1776, when the Declaration of Independence was signed.