Using leak detection oil allows the technician to pinpoint all manner of system leaks including the air intake, cooling, evaporation, fuel, exhaust and vacuum systems.Does not damage vehicle components during use.Leak detector oil can be poured directly into the smoke diagnostic tool.Model No. LDO50ESSENTIAL FOR DIAGNOSTICS - Allows the technician to pinpoint all manner of system leaks including the air intake, cooling, evaporation, fuel, exhaust and vacuum systems.SMOKE DIAGNOSTIC TOOL COMPATIBLE - Manufactured for use with Sealey Smoke Diagnostic Tools VS868, VS869 and VS870.SAFE FORMULA - Does not damage vehicle components during use.EASY TO USE - Leak detector oil can be poured directly into the smoke diagnostic tool.