any of those gas savers work for anyone on here?

I've seen minor results on my 1998 Escort ZX2 with aerodynamic changes. Removing mud flaps, adding a grill block and shortning the antenna. Over inflated the tires and a good alinment helped. Also running Amsoil and synthetic MTX fluid. The best result I've seen was a under drive crank pulley. Here is my gas log

http://www.gassavers.org/garage/viewgaslog/2538

the milage has started getting worse because of colder weather and I'm really just not trying anymore. I figure the worst on the Escort is better than the best on my truck