Oil prices are high because the value of the dollar is low compared to other currencies around the world. Since oil on the market is priced using American dollars, it takes more of them to equal the value it once had. If the dollar value goes up then the price of oil and other commodities will come down. Supply and demand also drives the price of it up. Sorry to hear that you have to sell your truck. I have thought about doing that also. But the truck is paid for and sense there are no more payments I will keep it for now and just keep buying gas for it.