A device which constantly applies oil to the chain during the race An oiler is not needed in all types of karting It is most often used in enduro racing (due to the longer duration of the race the chain needs to be prevented from drying out) and dirt racing
An unlicensed member of the engine room staff who oils and greases bearings and moving parts of the main engine and auxiliaries Most of this work is now done automatically and the oiler merely insures it operates correctly