Passing gas

What with the cost of gasoline these days, we can expect a renewed outbreak of gimmicks, scams and slinky salesmanship designed to relieve the panicked and gullible of some extra cash. Since I began reading car magazines and accessory catalogs as a kid in the 1950's there have always been gadgets: magnets you clamp on your fuel line, resistors to put in series with the ignition cables, little pills that go in the gas tank, things you put in the air intake, little propellers that fit under a carb