Using UV light (black light)

1. Remove any oil on the engine or transmission/transaxle.
   NOTE:

   • Referring to the fluorescent dye instruction manual, mix the specified amount of dye into the engine oil or transmission/transaxle oil.
2. Pour the fluorescent dye into the engine oil or transmission/transaxle oil.
3. Allow the engine to run for 30 min  .
4. Inspect for dye leakage by irradiating with UV light (black light), and identify the type of oil that is leaking.
5. If no dye leakage is found, allow the engine to run for another 30 min. or drive the vehicle then reinspect.
6. Find where the oil is leaking from, then make necessary repairs.
   NOTE:

   • To determine whether it is necessary to replace the oil after adding the fluorescent dye, refer to the fluorescent dye instruction manual.

Not using UV light (black light) 

1. Gather sample of the leaking oil using an absorbent white tissue.
2. Then, gather some samples of engine and transmission/transaxle oil onto a white cloth or piece of paper.
   • MT vehicles: Transmission/transaxle oil
   • AT vehicles: ATF
3. Compare the appearance and smell, and identify the type of oil that is leaking.
4. Remove any oil on the engine or transmission/transaxle.
5. Allow the engine to run for 30 min  .
6. Check the area where the oil is leaking, then make necessary repairs.
   Fig 1: Identifying Leaked Transaxle Oil

   Courtesy of MAZDA MOTORS CORP.