I parked my truck for a month . . . gas went up 50 cents.   

Could be. I've had Homer parked since last August. I've had my Baja parked for about 4 years. Joy's convertible for about 5. My autostick for 6 or 7. The Dasher for 3. My 74 Sun Bug for about 10.  Plus the ones that have been parked the whole time I've owned 'em. So, I guess it's my fault that gas is approaching 5 buck a gallon.   

Maybe the Shell guy was talking about functional machinery . Look how much money you would save if you were driving all those cars and then park them for one day and watch the gas price go down.

Rick, we will still find a way to blame you!! Hehehehe.

Maybe the Shell dude was right. On CNN this morning was reporting that US drivers have changed driving habits by 30% , buying smaller cars 30 something% ,  drivers curtailing vacation trips by34% saving almost 3.4 million gal of gas last month alone.
   Price per barrel of oil went down but the price of gas went up . The price may have spiked because people are not buying. The oil companies  have gas running out their ears. I'm with the Shell dude.  I still say park them for one day.
This just in !   If you rent a car , be sure to fill it up before you return it.  If you don't the top companies are charging as much as $9.00 per gal that you get to pay.