Don't quote me on this, strictly going off memory, but wasn't it Morgan Shephard who used to take advantage of this a few years back? He would show up each week, not practice, turn 1 lap of qualifying just to get in the show, and pull in after 1 or 2 laps of the start.
I remember the announcers somewhat laughing about it because they would show his pit stall before the start of the race. No fuel jugs, no tires stacked up, no toolbox, no NOTHING in his pit. There was 2-3 guys standing behind the wall and after the race started he would just pull straight back to the garage and load up.
The announcers claimed he could attend 4 race weekends on 1 set of tires! :rolling
David.