tricycle- Well, I guess that depends on how big the drop is
Realistically, it takes maybe half an ounce to do a good-sized vehicle. I use less than that to to my minivan but I'm a bit of a fanatic about the thin application thing.
I hold the applicator over the opening in the bottle and shake it, this deposits a small drop on the applicator. Then I *move* the applicator and do it again, depositing another tiny drop on a different area of the applicator. I repeat this until there's a little KSG moistening the pad (not *wetting* it) and then I fold the pad over and rub it together to distribute the KSG a little better. I use that amount, rubbing it on until the pad starts to "grab" as opposed to gliding over the panel. At that point I add more KSG to the pad using the same method- here, yeah, maybe one drop added to the pad for a small panel. No, I don't otherwise prime the pad in any way, but IIRC others do.
One drop per vehicle, heh heh, nah...but it sure doesn't take an ounce to do even a big vehicle. I layer my KSG with *many* applications, I apply a *LOT* of it to wheels, and yeah... I've also knocked the bottle over and spilled a bunch of it too

But my 8-year-old bottle of KSG is still at least half full. If you use more than an ounce to do *anything* (even a Suburban) you're simply making the buff-off harder than it needs to be.