Wait for it.
Gasoline, as a commodity, is not very elastic, i.e. the consumer response to price increases is slow. But how are those big cars selling right now?
Currently the price of oil is far higher than it ought to be given the real price drivers. At this point, IMO, only an idiot would be investing in oil futures.
Look at the curves over the past thirty years or so, and remember we've been through this before in the oil market, including the drastic price drop after the irrational peak.