Ford — Engine Oil Leak Check - Fluorescent Oil Additive Method
Testing & diagnosis
From a Ford service manual — check it applies to your exact model before use.
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Procedure
- Clean engine with a suitable solvent to remove all traces of oil.
- Drain engine oil from crankcase and refill with recommended oil premixed with 29.6 ml (1 fluid ounce) of Rotunda Fluorescent Oil Additive 112-R0015.
- Run engine for 15 minutes, then inspect all seal and gasket areas using Rotunda Oil Leak Detector Y112-R0021 lamp.
- If necessary, pressurize main oil gallery system to locate leaks due to improperly sealed, loose or cocked plugs.
- Service all leaks as required.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Ford service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.