ok i know about the whole lighter is better thing but when do u feel a substancial difference ? i recently had a problem with my passanger seat .. so i took it out to find out the problem . after i took it out i also took out the backseat .. i also have the spare and jack out .. so i decide to go for a ride and sure enough .. in my mind she felt a little quicker .. not much but enough to squeel the tires by just giving my auto a 1/2 press on the throttle .

now my question is .. how much weight do u need to drop to feel a big difference ....