Chapter 4 N40469 Lubricating oil specification Use only good quality lubricating oil which is equivalent to or above the minimum specification shown in the table below. Target oil specifications are: Oil change period is 500 hrs. on CH4 oils and higher specifications Caution: The type of lubricating oil to be used may be affected by the quality of the fuel which is available. Always ensure that the correct viscosity grade of lubricating oil is used for the ambient temperature range in which the engine will run as shown in the chart. Page 20 Engine type Specification 1106D-E66TA API/CH4/CI4