no need for inline oiler cos they are shite just put a drop of oil down the end of the air tool every now and then an it will be fine.Change the oil in the comp maybe once a year and thats all they need just use a car oil like 15/40.Probably only need to drain the air reciever once a week it depends on how often u use it and the weather also has an effect as if its damp the air drawn in is damp and hence you get damp air in the air reciever so more water.Hope this helps you mate