these things are so silly .. if anyone was to take this serous they would be filling up the day before so they have gas .. it has no effect in the end. unless everyone car pools or takes a bike you're still using the same amount of gas. I'd love to see proof of the gas drop after the last one. people start these chain mails for some odd reason and people pass them on for an even odder reason. I'll be getting gas just like any other day ... Sorry
If you want to make a difference get a Hybrid or take a bike to work.