i have a ? i see arco gas is cheaper and i hear rumors it will destroy your car and what not but what is actually true i mean any gas can be bad i remember hearing a few years ago Shell had a problem with too much sulfur and had to pay for repair work so i think gas is gas as far as unleaded goes. as a matter of fact i see the fuel depot for the state and i notice all the tanks are the same and the chevron and shell trucks are right behind the no name arco truck so i wonder. i think premium is a different story but please chime in i want to know as much as possible