Ask yourself. Why do they have to lower the price?
Their main expneses:
The inflation rate is 1.3%. Its a factor but not a big one. Tax/terrif .09. Packaging 34% gas station sales 18%, railroad,shipping 15%, mining, 25%. The other ~7-10% is gifts (cough) lobbying (cough).
They know what people will spend. Trust me they want to raise it back to $4.00
The reason they are lowering prices is to compete with the company(group) who is attempting to undercut them, unfortunately in a very unethical and immoral way.
So by cutting these prices they will minimize the other groups profits/gains in the market. OPEC has the power to do that/money to fool around. So it puts the other company who has very similar goods in a very competive situation. It is strategy by large companies to dominate or at least pull equal sales by a growing company in the market.
Fuel is all the same. So OPEC has to bully and match the compition from a business perspective, to keep the other group from gaining market share, until the bad group is formitably defeated for cheating the system and being evil.