Troubled by embarrassing wetness? Unlike personal hygiene issues, which are easily rectified, chasing down an oil leak, whether it be from the engine, transmission or rear drive, can be a real hassle. Vibration, heat and airflow tend to smear the oil all over the place, which complicates finding the source of the leak, especially if it’s a relatively small one. Professional wrenches have access to leak detection kits that use dye and a black light to pinpoint the gusher, but those aren’t something the average Joe generally has floating around in his medicine cabinet. On the other hand, aerosol deodorants usually are, particularly if Joe is well groomed, and in a pinch they make a very passable leak detector. Here’s the drill.