I have a vintage unused bumper sticker that says, “President Carter...KISS MY GAS!” That was probably as coarse as one would get on a bumper sticker back then. (That and “If this Van’s Rocking Don’t Come Knocking!”) I remember the Plains Wonder Boy asking everyone to turn their thermostats down at night, but 55 seems lower than I can recall.
55 is lower than I recall as well. It was actually 65. The writer may have somehow gotten this mixed up with the 55 mph speed limit.