QSC8.3 and QSL9 Normal Starting Procedure Section 1 - Operating Instructions Page 1-5 After starting a cold engine, increase the engine speed (rpm) slowly to provide adequate lubrication to the bearings and to allow the oil pressure to stabilize. CAUTION Do not operate engine at low idle for long periods with engine coolant temperature below the minimum specification in Maintenance Specifications (Section V). This can result in the following: Fuel Dilution of the lubricating oil Carbon build up in the cylinder Cylinder head valve sticking Reduced performance