I fitted my asian made mill with grease nipples as oiling points and modified an old grease gun to pump the oil in and it works perfectly .
All i did was blank the end of the grease canister off so it creates an oil can and use the air bleed plug on the pump head to fill it , i have seen some modifications on the intrnet for the grease nipple coupling but never ended up doing it as the standard grease coupling works just fine with oil .
Guy leutard was the inspiration for that modification .
May be a problem with a myford as there is that oil point in the back pulleys and getting a grease coupling on and off could be a problem .