Came across a very interesting website. HT: CARPE DIEM
If you are concerned about the price of gas going up this may be perfect for you. Buy at today's prices if you think they are going up. If you think prices are going to fall do nothing.
National average for 87 unleaded is about $4.099 per gallon.
If you think gas will go up to $5 a gallon, you buy gas at today's price. The great thing is that you do not have to take all 100 gallons [or other amount] today. You can take delivery when pump prices are $5. You get that gas for what was the current price when you bought it in bulk for future delivery.
Here is the website: MyGallons.com
See for yourself.