[tmoble]

clean the engine as best you can and add the fluorescent dye available at most auto parts stores. they usually also sell the black light flashlights used for the inspection. Or try Home Depot or Lowes or whatever if they don't. check right away after adding the dye, otherwise the dye will get spread around and you're back where you started.

Lots of good info in Ravens reply.

Same technique for the tranny. might want to try it first lest dye from the engine gets all over it. Popular leak point on tranny is the o-ring or rubber bootie for the dipstick tube.