whats the gap for plugs on a 2000 honda civic CX? and has anybody used these quad tipped platinum plugs? my uncle has an 02 civic that he put them in and he says his gas mileage went up about 2/3 miles per gallon. mine needs a tune up anyway and that is the type of savings I could recoup rather quickly with gas where it is now. I had heard of dual tipped like splitfire and such but quad tipped? seems kinda like overkill but hey look at my 80.