Black Light Process Check

This method uses a flourescent dye added to the engine oil (dye is available from one source, that is Kent-Moore distributors). One (1) ounce of dye should be circulated in the engine oil for a minimum of five (5) minutes. In some cases, it may be necessary to drive the car before the dye will show. Ideal situation is to install dye in the customers vehicle a few days before the scheduled repair. Prior to the black light inspection of the engine, the dipstick should be held under the black light to assure that the dye has mixed thoroughly with the engine oil. Oil with dye additive will be a bright yellow when exposed to a black light. Oil without dye additive will show a light purple in color. It is not necessary to clean the engine prior to inspection. The difference between oil leaking with the dye additive versus old oil is quite evident.