I don't really get this.
Are people spending so perfectly that at $4/gal they are left with exactly $0 at the end of the month? And now they find themselves with exactly the savings left from cheap gas?
I don't budget, I don't find value in it, so I haven't really "seen" the savings from gas, because we just save it anyway. It is a non-consideration, even though we probably run through 50 tanks a year between the two of us.