Both, I will tip the mechs when I get something done, since they will do things when I come in, if I time it right (early in, no Mondays or Fridays.) I bring by goodies from time to time, especially Christmas. A 6 pack occasionally usually goes over well, also. When the owner/head wrench chased and faced a BB for me and didn't want anything I slid him a twenty, compared to what it would cost anywhere else, it was a bargain.

Bill