Bob La Londe wrote:

I've got four machines with automatic oilers now. One pneumatic (with an
electric timer and a solenoid air valve) and three electric. The all have
a
fine filter screen under the fill cover. Its a pretty fine screen which I
appreciate. The problem is it takes a long time to fill.

Heat the oil in a bucket of hot water first. Then, when filling, make sure
the screen is not completely covered in oil, or it causes an air lock.

Jon