triple a here tested everyone of them things only one gave better gas milage and it was 1mpg more rest took away gas milage.best ways to get better gas milage is always get gas after the sun sets keep your tires fulled inflated a clean air filter and a well mantianced car.always drive the interstate stop and go kills milage also do the speed limit or slower and no lead footing it take off slowy.

 

Ya I heard those things are crap too. They don't really work. Only in America boys,only in America.


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At the dyno shop I go to there was one of those Tornado things you stick in your air cleaner nailed to the wall. They said it COST 17 hp at the rear wheels on a Nova...