hambandit
+1y
theres a dipstick that comes with some of the compressors i think the level is like an inch or so off the bottom of the case. if yours doesnt have a dipstick a piece of hanger or an allen wrench or something will work. i ran gear oil in the case and 30wt in the oiler.
or you can do this sweet mod where you run the oiled air through the case and then into the input to keep the guts cool/oiled