Hi there,

I'm using an air sander and it keeps getting stuck which I'm guessing is due to the lack of oil, I have a water trap but no inline oil, what could I use or best to use from your opinions? Is there anything that is easy and quick to fill up so I don't put off re-filling

Thanks in advance

I use one of these of each of my air tools. Undo the screw and put some oil in, because its attached to the tool you can see easily how much oil is in there and you don't contaminate the air line with oil.
http://www.toolstation.com/shop/Mini+Inline+Oiler/p13448

squish of wd40 into the inlet for every full hour of use. at least the last tool i bought said that on the instruction papers. not wd40, but air tool oil.
guy in machine mart told me wd40, so i've taken his oil of choice, with a manufacturers frequency

Usually plenty of air line oil in Aldi if you have a root through the offer bins.