HERE'S THE IDEA:

For the rest of this year, DON'T purchase ANY gasoline from the two
biggest
companies (which
now are one), EXXON and MOBIL. If they are not selling any gas, they will
be
inclined to reduce their prices. If they reduce their prices, the other
companies will have to follow suit.

But if you aren't going to buy from Exxon or Mobil, why would the other
companies match their price increase? Wouldn't they increase their prices
because they are selling more gas then they can reasonably get? (think
supply and demand curves...)

If you tried to think of the stupidest idea ever, you did a great job.