Don't just take it and be the dog of the well connected oil companies. There has been proposed legislation to make gas price gouging a crime. Sign the petition here (nearly 200,000 Americans have already signed): http://pol.moveon.org/stoppricegouging/

I'd ordinarily also suggest keeping your car well tuned and the tires properly inflated to maximize fuel efficiency, but I know the company I'm keeping and understand it would be beyond unnecessary

Cheers!