Pretty much, good post here! The fact is that they raise the price let's say 10, than they lower it, and after that they raise it 10 again and so on and on. Scam? Fishy? No, it's the government. LOL.This was explained to me once, so I will try here. The gas we buy at our local corner store we pay the price for that gas that is already in the tanks at the station at the price the vendor paid per gallon plus a few cents extra for profit. Truth be told the people who own the Sunoco or BP stations don't make a lot of money like their parent companies (Sunoco and BP) - they make more money on the sale of concessions (beer, pop, pizza, etc.)
When the price of gas falls it's because when the new shipment comes in you'll pay the lower price because that gas was at a lower price when refined. Eventually it evens out when the price of oil starts to go up - there will be short (very short) leveling period and you'll price begin to rise (sometimes as high as 5 to 10 cents per day)!
It's usually cyclical - gas prices tend to drop in the winter and rise in the summer (at least in the U.S.) that is NOT always the trend, but if you look at it historically, that is USUALLY how it works - sometimes you will see spikes in the winter months but usually this time of year you'll see gas prices come back down a bit.
What you have hopefully noticed over time is that gas prices have NEVER returned to their all time lows - the low gets progressively higher each year to prepare consumers. Can anyone remember gas at $.99 a gallon or cheaper? I can - those days (at least in New York) are long gone!